diff --git a/src/api/finance/purchasingrequisition.ts b/src/api/finance/purchasingrequisition.ts
index a9680f7..90c41a2 100644
--- a/src/api/finance/purchasingrequisition.ts
+++ b/src/api/finance/purchasingrequisition.ts
@@ -102,6 +102,31 @@ export function sendToAgent(applyId: number | string) {
 	});
 }
 
+/**
+ * 撤回招标代理：撤回已发送的招标代理
+ * @param applyId 采购申请ID
+ */
+export function revokeAgent(applyId: number | string) {
+	return request({
+		url: '/purchase/purchasingapply/revokeAgent',
+		method: 'post',
+		data: { id: Number(applyId) }
+	});
+}
+
+/**
+ * 保存实施采购方式（分步骤实施采购-第一步）
+ * @param id 采购申请ID
+ * @param implementType 实施采购方式：1-自行组织采购，2-委托代理采购
+ */
+export function saveImplementType(id: number | string, implementType: string) {
+	return request({
+		url: '/purchase/purchasingapply/save-implement-type',
+		method: 'post',
+		data: { id: Number(id), implementType }
+	});
+}
+
 /**
  * 修改采购申请
  * @param obj 对象数据
diff --git a/src/views/finance/purchasingrequisition/implement.vue b/src/views/finance/purchasingrequisition/implement.vue
index c798e2c..0c3df90 100644
--- a/src/views/finance/purchasingrequisition/implement.vue
+++ b/src/views/finance/purchasingrequisition/implement.vue
@@ -1,52 +1,92 @@
 <template>
   <div class="implement-page">
     <div class="implement-form">
-      <el-form-item label="实施采购方式" required>
-        <el-radio-group v-model="implementType">
-          <el-radio :label="IMPLEMENT_TYPE.SELF_ORGANIZED">自行组织采购</el-radio>
-          <el-radio :label="IMPLEMENT_TYPE.ENTRUST_AGENT">委托代理采购</el-radio>
-        </el-radio-group>
-      </el-form-item>
+      <!-- 步骤一：选择实施采购方式 -->
+      <div class="step-section">
+        <div class="step-header">
+          <span class="step-number" :class="{ completed: step1Completed && !isEditingStep1 }">1</span>
+          <span class="step-title">选择实施采购方式</span>
+          <el-tag v-if="step1Completed && !isEditingStep1" type="success" size="small">已完成</el-tag>
+        </div>
+        <div class="step-content">
+          <el-form-item label="实施采购方式" required>
+            <el-radio-group v-model="implementType" :disabled="step1Completed && !isEditingStep1">
+              <el-radio :label="IMPLEMENT_TYPE.SELF_ORGANIZED">自行组织采购</el-radio>
+              <el-radio :label="IMPLEMENT_TYPE.ENTRUST_AGENT">委托代理采购</el-radio>
+            </el-radio-group>
+          </el-form-item>
+          <!-- 步骤一未完成：显示保存按钮 -->
+          <el-form-item v-if="!step1Completed">
+            <el-button type="primary" :loading="saveTypeSubmitting" :disabled="!implementType" @click="handleSaveImplementType">保存</el-button>
+          </el-form-item>
+          <!-- 步骤一已完成但正在编辑：显示修改确认按钮 -->
+          <el-form-item v-else-if="isEditingStep1">
+            <el-button type="primary" :loading="saveTypeSubmitting" :disabled="!implementType" @click="handleReSaveImplementType">确认修改</el-button>
+            <el-button @click="cancelEditStep1">取消</el-button>
+          </el-form-item>
+          <!-- 步骤一已完成且未在编辑：显示修改按钮 -->
+          <el-form-item v-else>
+            <el-button type="default" @click="startEditStep1">修改</el-button>
+          </el-form-item>
+        </div>
+      </div>
 
-      <!-- 分配代理（仅符合条件的申请单显示） -->
-      <template v-if="canAssignAgent">
-        <el-divider content-position="left">分配代理</el-divider>
-        <el-form-item label="分配方式">
-          <el-radio-group v-model="agentMode">
-            <el-radio label="designated">指定代理</el-radio>
-            <el-radio label="random">随机分配</el-radio>
-          </el-radio-group>
-        </el-form-item>
-        <el-form-item v-if="agentMode === 'designated'" label="选择代理">
-          <el-select v-model="selectedAgentId" placeholder="请选择招标代理" filterable style="width: 100%" :loading="agentListLoading">
-            <el-option v-for="item in agentList" :key="item.id" :label="item.agentName" :value="item.id" />
-          </el-select>
-        </el-form-item>
-        <el-form-item v-if="agentMode === 'random'" label="随机结果">
-          <div class="agent-roller">
-            <span v-if="rollingAgentName" class="rolling">{{ rollingAgentName }}</span>
-            <span v-else-if="assignedAgentName" class="assigned">已分配：{{ assignedAgentName }}</span>
-            <span v-else class="placeholder">点击下方按钮进行随机分配</span>
-          </div>
-        </el-form-item>
-        <el-form-item v-if="applyRow?.agentName" label="当前代理">
-          <el-tag>{{ applyRow.agentName }}</el-tag>
-        </el-form-item>
-        <el-form-item v-if="agentMode === 'designated'">
-          <el-button type="primary" :loading="assignAgentSubmitting" :disabled="!selectedAgentId" @click="handleAssignAgentDesignated">指定代理</el-button>
-        </el-form-item>
-        <el-form-item v-if="agentMode === 'random'">
-          <el-button type="primary" :loading="assignAgentSubmitting" :disabled="!!assignedAgentName" @click="handleAssignAgentRandom">随机分配</el-button>
-        </el-form-item>
-        <!-- 发送招标代理按钮 -->
-        <el-form-item v-if="canSendToAgent">
-          <el-button type="success" :loading="sendToAgentSubmitting" @click="handleSendToAgent">发送招标代理</el-button>
-        </el-form-item>
-      </template>
+      <!-- 步骤二：分配代理（仅委托代理采购且步骤一完成时显示） -->
+      <div v-if="showStep2" class="step-section">
+        <div class="step-header">
+          <span class="step-number" :class="{ completed: step2Completed }">2</span>
+          <span class="step-title">分配代理机构</span>
+          <el-tag v-if="step2Completed" type="success" size="small">已完成</el-tag>
+        </div>
+        <div class="step-content">
+          <el-form-item label="分配方式">
+            <el-radio-group v-model="agentMode">
+              <el-radio label="designated">指定代理</el-radio>
+              <el-radio label="random">随机分配</el-radio>
+            </el-radio-group>
+          </el-form-item>
+          <el-form-item v-if="agentMode === 'designated'" label="选择代理">
+            <el-select v-model="selectedAgentId" placeholder="请选择招标代理" filterable style="width: 100%" :loading="agentListLoading">
+              <el-option v-for="item in agentList" :key="item.id" :label="item.agentName" :value="item.id" />
+            </el-select>
+          </el-form-item>
+          <el-form-item v-if="agentMode === 'random'" label="随机结果">
+            <div class="agent-roller">
+              <span v-if="rollingAgentName" class="rolling">{{ rollingAgentName }}</span>
+              <span v-else-if="assignedAgentName" class="assigned">已分配：{{ assignedAgentName }}</span>
+              <span v-else class="placeholder">点击下方按钮进行随机分配</span>
+            </div>
+          </el-form-item>
+          <el-form-item v-if="applyRow?.agentName" label="当前代理">
+            <el-tag>{{ applyRow.agentName }}</el-tag>
+            <!-- 发送状态 -->
+            <el-tag v-if="applyRow?.agentSent === YES_NO.YES" type="success" style="margin-left: 8px;">已发送</el-tag>
+            <el-tag v-else type="info" style="margin-left: 8px;">未发送</el-tag>
+          </el-form-item>
+          <!-- 指定代理按钮：未发送招标代理时可操作 -->
+          <el-form-item v-if="agentMode === 'designated' && canReassignAgent">
+            <el-button type="primary" :loading="assignAgentSubmitting" :disabled="!selectedAgentId" @click="handleAssignAgentDesignated">{{ step2Completed ? '重新指定' : '指定代理' }}</el-button>
+          </el-form-item>
+          <!-- 随机分配按钮：未发送招标代理时可操作 -->
+          <el-form-item v-if="agentMode === 'random' && canReassignAgent">
+            <el-button type="primary" :loading="assignAgentSubmitting" @click="handleAssignAgentRandom">随机分配</el-button>
+          </el-form-item>
+          <!-- 发送招标代理按钮 -->
+          <el-form-item v-if="canSendToAgent">
+            <el-button type="success" :loading="sendToAgentSubmitting" @click="handleSendToAgent">发送招标代理</el-button>
+          </el-form-item>
+          <!-- 撤回招标代理按钮 -->
+          <el-form-item v-if="canRevokeAgent">
+            <el-button type="warning" :loading="revokeAgentSubmitting" @click="handleRevokeAgent">撤回</el-button>
+          </el-form-item>
+        </div>
+      </div>
     </div>
-    <div class="implement-footer">
+    <!-- 底部按钮：编辑步骤一时隐藏 -->
+    <div v-if="!isEditingStep1" class="implement-footer">
       <el-button @click="handleClose">取消</el-button>
-      <el-button type="primary" :loading="implementSubmitting" @click="handleImplementSubmit">确定</el-button>
+      <!-- 只有步骤一完成后才显示确定按钮 -->
+      <el-button v-if="step1Completed" type="primary" :loading="implementSubmitting" @click="handleImplementSubmit">确定</el-button>
     </div>
   </div>
 </template>
@@ -54,7 +94,7 @@
 <script setup lang="ts" name="PurchasingImplement">
 import { ref, computed, onMounted, watch, onUnmounted } from 'vue'
 import { useRoute } from 'vue-router'
-import { getDeptMembers, getObj, assignAgent, sendToAgent, implementApply } from '/@/api/finance/purchasingrequisition'
+import { getDeptMembers, getObj, assignAgent, sendToAgent, revokeAgent, saveImplementType } from '/@/api/finance/purchasingrequisition'
 import { getPage as getAgentPage } from '/@/api/finance/purchaseagent'
 import { useMessage } from '/@/hooks/message'
 import { Session } from '/@/utils/storage'
@@ -131,6 +171,12 @@ const applyRow = ref<any>(null)
 const implementType = ref<string>(IMPLEMENT_TYPE.SELF_ORGANIZED)
 const implementSubmitting = ref(false)
 
+/** 步骤控制 */
+const step1Completed = ref(false)
+const saveTypeSubmitting = ref(false)
+const isEditingStep1 = ref(false)
+const originalImplementType = ref<string>('')
+
 const representorMode = ref<'single' | 'multi'>('single')
 const representorTeacherNo = ref<string>('')
 const representorsMulti = ref<string[]>([])
@@ -145,12 +191,15 @@ const assignAgentSubmitting = ref(false)
 const rollingAgentName = ref<string>('')
 const assignedAgentName = ref<string>('')
 const sendToAgentSubmitting = ref(false)
+const revokeAgentSubmitting = ref(false)
 let rollInterval: ReturnType<typeof setInterval> | null = null
 
-/** 是否可以分配代理：委托代理采购 且 (学校统一采购 或 部门自行采购且委托采购中心采购) */
+/** 是否可以分配代理：委托代理采购 且 (学校统一采购 或 部门自行采购且委托采购中心采购) 且 步骤一已完成 */
 const canAssignAgent = computed(() => {
   // 自行组织采购不需要分配代理
   if (implementType.value !== IMPLEMENT_TYPE.ENTRUST_AGENT) return false
+  // 步骤一必须完成
+  if (!step1Completed.value) return false
   const row = applyRow.value
   if (!row) return false
   // 学校统一采购 或 部门自行采购且委托采购中心采购
@@ -158,6 +207,16 @@ const canAssignAgent = computed(() => {
     || (row.purchaseMode === PURCHASE_MODE.DEPT_SELF && row.purchaseChannel === PURCHASE_CHANNEL.ENTRUST_CENTER)
 })
 
+/** 是否显示步骤二：委托代理采购 且 步骤一已完成 且 不在编辑步骤一 */
+const showStep2 = computed(() => {
+  return step1Completed.value && !isEditingStep1.value && implementType.value === IMPLEMENT_TYPE.ENTRUST_AGENT
+})
+
+/** 步骤二是否完成：已分配代理 */
+const step2Completed = computed(() => {
+  return !!applyRow.value?.agentId
+})
+
 /** 是否可以发送招标代理：委托代理采购 且 已分配代理 且 未发送 */
 const canSendToAgent = computed(() => {
   // 自行组织采购不需要发送
@@ -168,8 +227,23 @@ const canSendToAgent = computed(() => {
   return !!row.agentId && row.agentSent !== YES_NO.YES
 })
 
+/** 是否可以重新分配代理：未发送招标代理时可操作 */
+const canReassignAgent = computed(() => {
+  const row = applyRow.value
+  if (!row) return false
+  // 未发送招标代理时可重新分配
+  return row.agentSent !== YES_NO.YES
+})
+
+/** 是否可以撤回招标代理：已发送招标代理时可撤回 */
+const canRevokeAgent = computed(() => {
+  const row = applyRow.value
+  if (!row) return false
+  // 已分配代理 且 已发送招标代理时可撤回
+  return !!row.agentId && row.agentSent === YES_NO.YES
+})
+
 const loadAgentList = async () => {
-  if (!canAssignAgent.value) return
   agentListLoading.value = true
   try {
     const res = await getAgentPage({ size: 500, current: 1 })
@@ -280,6 +354,106 @@ const handleSendToAgent = async () => {
   }
 }
 
+/** 撤回招标代理 */
+const handleRevokeAgent = async () => {
+  const id = applyRow.value?.id ?? applyId.value
+  if (!id) {
+    useMessage().warning('无法获取申请单ID')
+    return
+  }
+  revokeAgentSubmitting.value = true
+  try {
+    await revokeAgent(Number(id))
+    useMessage().success('已撤回招标代理')
+    await loadData()
+  } catch (e: any) {
+    useMessage().error(e?.msg || '撤回招标代理失败')
+  } finally {
+    revokeAgentSubmitting.value = false
+  }
+}
+
+/** 步骤一：保存实施采购方式 */
+const handleSaveImplementType = async () => {
+  const id = applyRow.value?.id ?? applyId.value
+  if (!id) {
+    useMessage().warning('无法获取申请单ID')
+    return
+  }
+  if (!implementType.value) {
+    useMessage().warning('请选择实施采购方式')
+    return
+  }
+  saveTypeSubmitting.value = true
+  try {
+    await saveImplementType(Number(id), implementType.value)
+    useMessage().success('保存成功')
+    step1Completed.value = true
+    originalImplementType.value = implementType.value
+    // 流程嵌入场景：通知流程 Tab 已保存
+    if (isFlowEmbed.value && props.currJob && props.currElTab?.id) {
+      orderVue.currElTabIsSave(props.currJob, props.currElTab.id, true, emit)
+    }
+    // 如果是委托代理采购，加载代理列表
+    if (implementType.value === IMPLEMENT_TYPE.ENTRUST_AGENT) {
+      await loadAgentList()
+    }
+  } catch (e: any) {
+    useMessage().error(e?.msg || '保存失败')
+  } finally {
+    saveTypeSubmitting.value = false
+  }
+}
+
+/** 开始编辑步骤一 */
+const startEditStep1 = () => {
+  originalImplementType.value = implementType.value
+  isEditingStep1.value = true
+}
+
+/** 取消编辑步骤一 */
+const cancelEditStep1 = () => {
+  implementType.value = originalImplementType.value
+  isEditingStep1.value = false
+}
+
+/** 重新保存实施采购方式（修改后确认） */
+const handleReSaveImplementType = async () => {
+  const id = applyRow.value?.id ?? applyId.value
+  if (!id) {
+    useMessage().warning('无法获取申请单ID')
+    return
+  }
+  if (!implementType.value) {
+    useMessage().warning('请选择实施采购方式')
+    return
+  }
+  saveTypeSubmitting.value = true
+  try {
+    await saveImplementType(Number(id), implementType.value)
+    useMessage().success('修改成功')
+    isEditingStep1.value = false
+    originalImplementType.value = implementType.value
+    // 如果从委托代理采购改为自行组织采购，清空代理相关状态
+    if (implementType.value === IMPLEMENT_TYPE.SELF_ORGANIZED) {
+      assignedAgentName.value = ''
+      selectedAgentId.value = ''
+    }
+    // 如果改为委托代理采购，加载代理列表
+    if (implementType.value === IMPLEMENT_TYPE.ENTRUST_AGENT) {
+      await loadAgentList()
+    }
+    // 流程嵌入场景：通知流程 Tab 已保存
+    if (isFlowEmbed.value && props.currJob && props.currElTab?.id) {
+      orderVue.currElTabIsSave(props.currJob, props.currElTab.id, true, emit)
+    }
+  } catch (e: any) {
+    useMessage().error(e?.msg || '修改失败')
+  } finally {
+    saveTypeSubmitting.value = false
+  }
+}
+
 const isInIframe = () => typeof window !== 'undefined' && window.self !== window.top
 
 const postMessage = (type: string, payload?: any) => {
@@ -304,7 +478,12 @@ const loadData = async () => {
 
     applyRow.value = detailRes?.data ? { ...detailRes.data, id: detailRes.data.id ?? id } : { id }
     const row = applyRow.value
-    if (row?.implementType) implementType.value = row.implementType
+    if (row?.implementType) {
+      implementType.value = row.implementType
+      originalImplementType.value = row.implementType
+      // 已有 implementType 说明步骤一已完成
+      step1Completed.value = true
+    }
     // 回显需求部门初审-采购代表人方式与人员
     if (row?.representorTeacherNo) {
       representorMode.value = 'single'
@@ -321,11 +500,18 @@ const loadData = async () => {
     }
     deptMembers.value = needDeptMembers && membersRes?.data ? membersRes.data : []
 
-    // 加载代理列表并回显已分配代理
-    if (canAssignAgent.value) {
-      await loadAgentList()
-      if (row?.agentName) {
-        assignedAgentName.value = row.agentName
+    // 加载代理列表并回显已分配代理（委托代理采购时）
+    if (step1Completed.value && implementType.value === IMPLEMENT_TYPE.ENTRUST_AGENT) {
+      // 先判断是否可以分配代理（学校统一采购 或 部门自行采购且委托采购中心采购）
+      const canLoadAgent = row.purchaseMode === PURCHASE_MODE.SCHOOL_UNIFIED
+        || (row.purchaseMode === PURCHASE_MODE.DEPT_SELF && row.purchaseChannel === PURCHASE_CHANNEL.ENTRUST_CENTER)
+      if (canLoadAgent) {
+        await loadAgentList()
+        // 回显已分配代理
+        if (row?.agentId) {
+          selectedAgentId.value = row.agentId
+          assignedAgentName.value = row.agentName || ''
+        }
       }
     }
   } catch (_) {
@@ -346,14 +532,28 @@ const handleImplementSubmit = async () => {
   if (!row?.id && !applyId.value) return
   const id = row?.id ?? applyId.value
   if (!id) return
-  if (!implementType.value) {
-    useMessage().warning('请选择实施采购方式')
-    return
+
+  // 步骤一未完成时，先保存步骤一
+  if (!step1Completed.value) {
+    if (!implementType.value) {
+      useMessage().warning('请选择实施采购方式')
+      return
+    }
+    // 自动保存步骤一
+    saveTypeSubmitting.value = true
+    try {
+      await saveImplementType(Number(id), implementType.value)
+      step1Completed.value = true
+    } catch (e: any) {
+      useMessage().error(e?.msg || '保存实施采购方式失败')
+      return
+    } finally {
+      saveTypeSubmitting.value = false
+    }
   }
 
   implementSubmitting.value = true
   try {
-    // TODO: 调用保存接口
     useMessage().success('实施采购已保存')
     postMessage('purchasingimplement:saved')
     // 流程嵌入场景：通知流程当前 Tab 已保存
@@ -367,7 +567,7 @@ const handleImplementSubmit = async () => {
   }
 }
 
-/** 流程嵌入时供 handle.vue 调用的”保存”回调：与页面按钮保存逻辑保持一致 */
+/** 流程嵌入时供 handle.vue 调用的"保存"回调：与页面按钮保存逻辑保持一致 */
 async function flowSubmitForm() {
   await handleImplementSubmit()
 }
@@ -430,6 +630,47 @@ onUnmounted(() => {
   flex-wrap: wrap;
 }
 
+.step-section {
+  margin-bottom: 24px;
+  padding: 16px;
+  background: var(--el-fill-color-lighter);
+  border-radius: 8px;
+}
+
+.step-header {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  margin-bottom: 16px;
+}
+
+.step-number {
+  width: 28px;
+  height: 28px;
+  border-radius: 50%;
+  background: var(--el-color-primary);
+  color: #fff;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-weight: 600;
+  font-size: 14px;
+
+  &.completed {
+    background: var(--el-color-success);
+  }
+}
+
+.step-title {
+  font-weight: 500;
+  font-size: 16px;
+  color: var(--el-text-color-primary);
+}
+
+.step-content {
+  padding-left: 40px;
+}
+
 .agent-roller {
   padding: 12px 16px;
   background: var(--el-fill-color-light);
@@ -460,4 +701,4 @@ onUnmounted(() => {
   0%, 100% { opacity: 1; }
   50% { opacity: 0.7; }
 }
-</style>
+</style>
\ No newline at end of file