diff --git a/src/pages/Index/components/Setting/EnterPinModal.vue b/src/pages/Index/components/Setting/EnterPinModal.vue
index 6f87da4..d74995a 100644
--- a/src/pages/Index/components/Setting/EnterPinModal.vue
+++ b/src/pages/Index/components/Setting/EnterPinModal.vue
@@ -8,7 +8,7 @@
         </div>
         <div class="modal-body">
           <div class="input-container">
-            <input :type="isShowType?'text':'password'" v-model="pin" placeholder="输入密码" @focus="showKeyboard()" class="pin-input" />
+            <input :maxlength="4" :type="isShowType?'text':'password'" v-model="pin" placeholder="输入密码" @focus="showKeyboard()" class="pin-input" />
             <el-icon class="pwd-view" @click="isShowType = !isShowType"><View /></el-icon>
           </div>
         </div>
@@ -75,7 +75,7 @@ const handleKeyboardInput = (value: string) => {
   // 更新当前输入值
   currentInputValue.value = value
   // 更新对应字段的值
-  pin.value = value
+  pin.value = value.slice(0, 4)
 }
 
 // 处理键盘按键
diff --git a/src/pages/Index/components/Setting/UpdatePinModal.vue b/src/pages/Index/components/Setting/UpdatePinModal.vue
index 642d8b5..dff2e74 100644
--- a/src/pages/Index/components/Setting/UpdatePinModal.vue
+++ b/src/pages/Index/components/Setting/UpdatePinModal.vue
@@ -10,6 +10,7 @@
           <div class="input-container">
             <div>
               <input
+                :maxlength="4"
                 :type="showoldpasswd ? 'text' : 'password'"
                 v-model="oldpasswd"
                 placeholder="输入旧密码"
@@ -23,6 +24,7 @@
             <br />
             <div>
               <input
+                :maxlength="4"
                 :type="showPassword ? 'text' : 'password'"
                 v-model="password"
                 placeholder="输入新密码"
@@ -36,6 +38,7 @@
             <br />
             <div>
               <input
+                :maxlength="4"
                 :type="showConfirmPassword ? 'text' : 'password'"
                 v-model="confirmPassword"
                 placeholder="输入确认新密码"
@@ -171,11 +174,11 @@ const handleKeyboardInput = (value: string) => {
   // 更新对应字段的值
 
   if (currentInputField.value === 'oldpasswd') {
-    oldpasswd.value = value
+    oldpasswd.value = value.slice(0, 4)
   } else if (currentInputField.value == 'password') {
-    password.value = value
+    password.value = value.slice(0, 4)
   } else if (currentInputField.value == 'confirmPassword') {
-    confirmPassword.value = value
+    confirmPassword.value = value.slice(0, 4)
   }
 }