diff --git a/backend/src/routes/esign.routes.ts b/backend/src/routes/esign.routes.ts
index e8c8b8a..9805088 100644
--- a/backend/src/routes/esign.routes.ts
+++ b/backend/src/routes/esign.routes.ts
@@ -221,6 +221,12 @@ router.post('/sign-date', async (req: AuthRequest, res: Response, next: NextFunc
     if (isNaN(parsedDate.getTime())) {
       return res.status(400).json({ success: false, error: { code: 'VALIDATION_ERROR', message: '签署日期格式无效' } })
     }
+    // 签署日期不能晚于当前日期
+    const today = new Date()
+    today.setHours(23, 59, 59, 999)
+    if (parsedDate > today) {
+      return res.status(400).json({ success: false, error: { code: 'VALIDATION_ERROR', message: '签署日期不能晚于当前日期' } })
+    }
     // 更新合同签署日期
     await prisma.laborContract.update({
       where: { id: contractId },
@@ -623,6 +629,14 @@ router.post('/paper-sign', authMiddleware, async (req: AuthRequest, res: Respons
       return res.status(404).json({ success: false, error: { code: 'NOT_FOUND', message: '员工不存在' } })
     }
 
+    // 签署日期不能晚于当前日期
+    const signDate = new Date(data.signedAt)
+    const todayEnd = new Date()
+    todayEnd.setHours(23, 59, 59, 999)
+    if (signDate > todayEnd) {
+      return res.status(400).json({ success: false, error: { code: 'VALIDATION_ERROR', message: '签署日期不能晚于当前日期' } })
+    }
+
     // 创建签署记录（线下手签直接为 COMPLETED 状态）
     const record = await prisma.eSignRecord.create({
       data: {
diff --git a/frontend/src/pages/ESign.tsx b/frontend/src/pages/ESign.tsx
index 89604b4..e151f1c 100644
--- a/frontend/src/pages/ESign.tsx
+++ b/frontend/src/pages/ESign.tsx
@@ -528,7 +528,7 @@ function PaperSignModal({ onClose, onSuccess, initialEmployeeId, initialScene, i
         <div className="grid grid-cols-2 gap-2">
           <div>
             <Label>签署日期 *</Label>
-            <Input type="date" value={form.signedAt} onChange={(e) => setForm({ ...form, signedAt: e.target.value })} />
+            <Input type="date" max={new Date().toISOString().slice(0, 10)} value={form.signedAt} onChange={(e) => setForm({ ...form, signedAt: e.target.value })} />
           </div>
           <div>
             <Label>签署地点</Label>
@@ -935,6 +935,7 @@ function PendingTab({ pendingList, loading, onRemind, remindLoading, remindData,
                                       <>
                                         <input
                                           type="date"
+                                          max={new Date().toISOString().slice(0, 10)}
                                           value={signDateValue}
                                           onChange={(e) => setSignDateValue(e.target.value)}
                                           className="h-7 px-2 text-xs border rounded"