diff --git a/src/api/purchase/purchasingrequisition.ts b/src/api/purchase/purchasingrequisition.ts
index 98c1689..53a6d8c 100644
--- a/src/api/purchase/purchasingrequisition.ts
+++ b/src/api/purchase/purchasingrequisition.ts
@@ -252,6 +252,19 @@ export function saveRepresentor(id: number, representorTeacherNo?: string, repre
 	});
 }
 
+/**
+ * 随机抽取部门参与人
+ * @param applyId 采购申请ID
+ * @param memberTeacherNos 参与随机抽取的人员工号列表（逗号分隔）
+ */
+export function randomSelectRepresentor(applyId: string, memberTeacherNos: string) {
+	return request({
+		url: '/purchase/purchasingapply/randomSelectRepresentor',
+		method: 'post',
+		data: { applyId, memberTeacherNos },
+	});
+}
+
 /**
  * 文件归档：按文件类型打包下载该申请单下所有附件的下载地址（GET 请求，浏览器直接下载 zip）
  * @param purchaseId 采购申请ID
diff --git a/src/views/purchase/purchasingrequisition/bidfile-audit.vue b/src/views/purchase/purchasingrequisition/bidfile-audit.vue
index 91d77d6..5483171 100644
--- a/src/views/purchase/purchasingrequisition/bidfile-audit.vue
+++ b/src/views/purchase/purchasingrequisition/bidfile-audit.vue
@@ -208,13 +208,109 @@
 				</el-form-item>
 			</el-form>
 		</el-card>
+
+		<!-- 部门参与人选择（部门负责人审核时显示） -->
+		<el-card v-if="showRepresentorSection" shadow="never" class="representor-card">
+			<template #header>
+				<div class="card-header">
+					<span class="card-title">
+						<el-icon><User /></el-icon>
+						部门参与人
+					</span>
+					<el-tag v-if="applyData.representorTeacherNo" type="success">已设置</el-tag>
+					<el-tag v-else type="warning">待设置</el-tag>
+				</div>
+			</template>
+			
+			<el-form label-width="120px">
+				<el-form-item label="选择方式">
+					<el-radio-group v-model="representorSelectMode" :disabled="isViewMode">
+						<el-radio label="designate">指定一人</el-radio>
+						<el-radio label="random">随机抽取</el-radio>
+					</el-radio-group>
+				</el-form-item>
+
+				<!-- 指定一人 -->
+				<el-form-item v-if="representorSelectMode === 'designate'" label="选择参与人">
+					<el-select
+						v-model="selectedRepresentor"
+						placeholder="请选择参与人"
+						filterable
+						:disabled="isViewMode"
+						style="width: 300px"
+					>
+						<el-option
+							v-for="member in deptMembers"
+							:key="member.teacherNo"
+							:label="`${member.realName} (${member.teacherNo})`"
+							:value="member.teacherNo"
+						/>
+					</el-select>
+				</el-form-item>
+
+				<!-- 随机抽取 -->
+				<el-form-item v-if="representorSelectMode === 'random'" label="选择候选人">
+					<el-select
+						v-model="randomCandidates"
+						placeholder="请选择参与随机抽取的人员（可多选）"
+						multiple
+						filterable
+						:disabled="isViewMode"
+						style="width: 400px"
+					>
+						<el-option
+							v-for="member in deptMembers"
+							:key="member.teacherNo"
+							:label="`${member.realName} (${member.teacherNo})`"
+							:value="member.teacherNo"
+						/>
+					</el-select>
+					<el-button
+						type="primary"
+						:loading="randomSelectLoading"
+						:disabled="randomCandidates.length < 2 || isViewMode"
+						style="margin-left: 12px"
+						@click="handleRandomSelect"
+					>
+						随机抽取
+					</el-button>
+				</el-form-item>
+
+				<!-- 已选中的参与人 -->
+				<el-form-item v-if="currentRepresentor" label="已选中参与人">
+					<el-tag type="success" size="large">
+						{{ currentRepresentor.realName }} ({{ currentRepresentor.teacherNo }})
+					</el-tag>
+				</el-form-item>
+
+				<!-- 参与人身份 -->
+				<el-form-item label="参与人身份" required>
+					<el-radio-group v-model="representorType" :disabled="isViewMode">
+						<el-radio label="purchase_rep">采购代表</el-radio>
+						<el-radio label="judge">评委</el-radio>
+					</el-radio-group>
+				</el-form-item>
+
+				<!-- 保存按钮 -->
+				<el-form-item>
+					<el-button
+						type="primary"
+						:loading="saveRepresentorLoading"
+						:disabled="!canSaveRepresentor || isViewMode"
+						@click="handleSaveRepresentor"
+					>
+						保存参与人信息
+					</el-button>
+				</el-form-item>
+			</el-form>
+		</el-card>
 	</div>
 </template>
 
 <script setup lang="ts" name="BidFileAudit">
 import { ref, reactive, computed, onMounted, watch } from 'vue';
 import { useRoute } from 'vue-router';
-import { Document, FolderOpened, Upload, Link, Guide } from '@element-plus/icons-vue';
+import { Document, FolderOpened, Upload, Link, Guide, User } from '@element-plus/icons-vue';
 import { ElMessage } from 'element-plus';
 import { Session } from '/@/utils/storage';
 import { useUserInfo } from '/@/stores/userInfo';
@@ -232,6 +328,7 @@ import {
 } from '/@/api/purchase/bidfile';
 import { getRequirementFiles } from '/@/api/purchase/purchasingfiles';
 import { currElTabIsSave } from '/@/api/order/order-key-vue';
+import { getDeptMembers, saveRepresentor, randomSelectRepresentor } from '/@/api/purchase/purchasingrequisition';
 
 // ==================== Props & Emits ====================
 
@@ -252,7 +349,8 @@ const currentUserRoleCodes = computed(() => userStore.userInfos.roleCodes || [])
 const ROLE_LABEL_MAP: Record<string, string> = {
 	PURCHASE_AGENT: '招标代理',
 	PURCHASE_ASSET: '资产管理处',
-	PURCHASE_DEPT_APPLY: '部门负责人',
+	PURCHASE_DEPT_APPLY: '部门经办人',
+	PURCHASE_DEPT_AUDIT: '部门负责人',
 	PURCHASE_FILE_AUDIT: '内审部门',
 	PURCHASE_CENTER: '采购中心',
 };
@@ -295,6 +393,7 @@ const isViewMode = computed(() => {
 const isAgent = computed(() => currentUserRoleCodes.value.includes('PURCHASE_AGENT'));
 const isAsset = computed(() => currentUserRoleCodes.value.includes('PURCHASE_ASSET'));
 const isDeptApply = computed(() => currentUserRoleCodes.value.includes('PURCHASE_DEPT_APPLY'));
+const isDeptAudit = computed(() => currentUserRoleCodes.value.includes('PURCHASE_DEPT_AUDIT'));
 const isFileAudit = computed(() => currentUserRoleCodes.value.includes('PURCHASE_FILE_AUDIT'));
 
 // 是否显示上传区域
@@ -311,6 +410,12 @@ const showFlowTargetSection = computed(() => {
 	return isAsset.value && isFlowEmbed.value;
 });
 
+// 是否显示部门参与人选择区域（仅部门负责人在审核时显示）
+const showRepresentorSection = computed(() => {
+	if (isViewMode.value) return false;
+	return isDeptAudit.value && isFlowEmbed.value;
+});
+
 // 采购申请数据
 const applyData = ref<any>({});
 const purchaseTypeLabel = computed(() => {
@@ -351,6 +456,24 @@ const uploadRules = {
 // 流转去向（资产管理处审核时使用）
 const flowTarget = ref<string>('');
 
+// 部门参与人选择相关（部门负责人审核时使用）
+const representorSelectMode = ref<'designate' | 'random'>('designate');
+const deptMembers = ref<any[]>([]);
+const deptMembersLoading = ref(false);
+const selectedRepresentor = ref<string>('');
+const randomCandidates = ref<string[]>([]);
+const currentRepresentor = ref<any>(null);
+const representorType = ref<string>('purchase_rep');
+const saveRepresentorLoading = ref(false);
+const randomSelectLoading = ref(false);
+
+const canSaveRepresentor = computed(() => {
+	if (representorSelectMode.value === 'designate') {
+		return !!selectedRepresentor.value;
+	}
+	return !!currentRepresentor.value;
+});
+
 // ==================== 计算属性 ====================
 
 const BID_FILE_TYPE = '130';
@@ -634,6 +757,93 @@ const registerFlowCallbacks = () => {
 	}
 };
 
+// ==================== 部门参与人选择 ====================
+
+const loadDeptMembers = async () => {
+	if (!showRepresentorSection.value) return;
+
+	try {
+		deptMembersLoading.value = true;
+		const res = await getDeptMembers();
+		if (res.code === 0 && res.data) {
+			deptMembers.value = res.data;
+		}
+	} catch (e: any) {
+		ElMessage.error(e?.msg || '加载部门人员失败');
+	} finally {
+		deptMembersLoading.value = false;
+	}
+};
+
+const handleRandomSelect = async () => {
+	if (randomCandidates.value.length < 2) {
+		ElMessage.warning('请至少选择2名候选人');
+		return;
+	}
+
+	try {
+		randomSelectLoading.value = true;
+		const res = await randomSelectRepresentor(
+			effectivePurchaseId.value,
+			randomCandidates.value.join(',')
+		);
+		if (res.code === 0 && res.data) {
+			currentRepresentor.value = res.data;
+			ElMessage.success(`随机抽取成功：${res.data.realName}`);
+		} else {
+			ElMessage.error(res.msg || '随机抽取失败');
+		}
+	} catch (e: any) {
+		ElMessage.error(e?.msg || '随机抽取失败');
+	} finally {
+		randomSelectLoading.value = false;
+	}
+};
+
+const handleSaveRepresentor = async () => {
+	if (!canSaveRepresentor.value) {
+		ElMessage.warning('请先选择参与人');
+		return;
+	}
+
+	if (!representorType.value) {
+		ElMessage.warning('请选择参与人身份');
+		return;
+	}
+
+	try {
+		saveRepresentorLoading.value = true;
+		let res: any;
+
+		if (representorSelectMode.value === 'designate') {
+			res = await saveRepresentor(
+				Number(effectivePurchaseId.value),
+				selectedRepresentor.value,
+				undefined,
+				representorType.value
+			);
+		} else {
+			res = await saveRepresentor(
+				Number(effectivePurchaseId.value),
+				currentRepresentor.value?.teacherNo,
+				randomCandidates.value.join(','),
+				representorType.value
+			);
+		}
+
+		if (res.code === 0) {
+			ElMessage.success('保存参与人信息成功');
+			await loadApplyData();
+		} else {
+			ElMessage.error(res.msg || '保存失败');
+		}
+	} catch (e: any) {
+		ElMessage.error(e?.msg || '保存失败');
+	} finally {
+		saveRepresentorLoading.value = false;
+	}
+};
+
 // ==================== 生命周期 ====================
 
 onMounted(async () => {
@@ -642,6 +852,9 @@ onMounted(async () => {
 	if (isAgent.value) {
 		await loadRequirementFiles();
 	}
+	if (showRepresentorSection.value) {
+		await loadDeptMembers();
+	}
 	registerFlowCallbacks();
 });
 
@@ -654,6 +867,9 @@ watch(
 			if (isAgent.value) {
 				await loadRequirementFiles();
 			}
+			if (showRepresentorSection.value) {
+				await loadDeptMembers();
+			}
 			registerFlowCallbacks();
 		}
 	},