diff --git a/backend/src/routes/employee.routes.ts b/backend/src/routes/employee.routes.ts
index ce798f9..a9cee3f 100644
--- a/backend/src/routes/employee.routes.ts
+++ b/backend/src/routes/employee.routes.ts
@@ -82,10 +82,23 @@ router.get('/list', authMiddleware, async (req: AuthRequest, res, next) => {
         status: { in: status },
         ...(department && { department }),
       },
-      select: { id: true, name: true, department: true, position: true, phone: true, gender: true, status: true },
+      select: { id: true, name: true, department: true, position: true, phone: true, gender: true, status: true, idCardNumber: true },
       orderBy: { name: 'asc' },
     })
-    res.json({ success: true, data: employees })
+    // 解密身份证号，返回完整明文用于前端下拉框区分同名员工
+    const employeesWithIdCard = employees.map((e: any) => {
+      let idCardNo = ''
+      if (e.idCardNumber) {
+        try {
+          const plain = decrypt(e.idCardNumber)
+          if (plain) idCardNo = plain
+        } catch {}
+      }
+      delete e.idCardNumber
+      e.idCardNo = idCardNo
+      return e
+    })
+    res.json({ success: true, data: employeesWithIdCard })
   } catch (err) {
     next(err)
   }
diff --git a/frontend/src/lib/api-services.ts b/frontend/src/lib/api-services.ts
index b8e8b8e..a00c3b2 100644
--- a/frontend/src/lib/api-services.ts
+++ b/frontend/src/lib/api-services.ts
@@ -48,6 +48,7 @@ export interface EmployeeOption {
   phone?: string
   gender?: string
   status?: string
+  idCardNo?: string
 }
 
 export const employeeApi = {
diff --git a/frontend/src/pages/ai-assistant/PredictTab.tsx b/frontend/src/pages/ai-assistant/PredictTab.tsx
index ce9e613..30bd094 100644
--- a/frontend/src/pages/ai-assistant/PredictTab.tsx
+++ b/frontend/src/pages/ai-assistant/PredictTab.tsx
@@ -557,7 +557,7 @@ export function PredictTab() {
               <Label className="whitespace-nowrap">员工</Label>
               <Select value={employeeId} onChange={(e) => setEmployeeId(e.target.value)}>
                 <option value="">选择员工</option>
-                {(employees || []).map((e: any) => <option key={e.id} value={e.id}>{e.name}</option>)}
+                {(employees || []).map((e: any) => <option key={e.id} value={e.id}>{e.name}（{e.idCardNo || e.department}）</option>)}
               </Select>
             </div>
           )}
@@ -621,7 +621,7 @@ export function PredictTab() {
                   <Label>涉及员工</Label>
                   <Select value={structEmployeeName} onChange={(e) => handleStructEmployeeChange(e.target.value)}>
                     <option value="">选择员工（可选）</option>
-                    {(employees || []).map((e: any) => <option key={e.id} value={e.name}>{e.name}（{e.department}）</option>)}
+                    {(employees || []).map((e: any) => <option key={e.id} value={e.name}>{e.name}（{e.idCardNo || e.department}）</option>)}
                   </Select>
                   {employeeSpecialStatus && (
                     <div className="mt-1 flex items-center gap-1 text-xs text-amber-700 bg-amber-50 border border-amber-200 px-2 py-1 rounded">