diff --git a/src/api/url.js b/src/api/url.js
index e2c02d7..a828494 100644
--- a/src/api/url.js
+++ b/src/api/url.js
@@ -180,6 +180,8 @@ export default {
     searchAllocationSN: "/accountManager/searchAllocationSN",
     // 搜索可分配的单位用户
     searchAllocationUser: "/accountManager/searchAllocationUser",
+    // 修改可管理的SN号数量
+    editSNCount: "/accountManager/editSNCount",
     // B端分配SN号
     allocationSN: "/accountManager/allocationSN",
     // 查看B端SN号分配记录
diff --git a/src/components/mainPage/SNAdmin.vue b/src/components/mainPage/SNAdmin.vue
index 79daab9..033d094 100644
--- a/src/components/mainPage/SNAdmin.vue
+++ b/src/components/mainPage/SNAdmin.vue
@@ -43,7 +43,7 @@
       >
         <div class="sn-count-label">
           用户可管理的SN号数量
-          <div>
+          <div class="flex justify-center">
             <el-input
               v-model.number="snCount"
               type="number"
@@ -52,6 +52,9 @@
               :min="0"
               @change="validateSNCount"
             />
+            <el-button type="primary" @click="editSNCount">
+              修改
+            </el-button>
           </div>
           <el-button class="bind-button" type="primary" @click="allocationSN">
             确认{{ mode ? "绑定" : "解绑" }}
@@ -227,6 +230,32 @@ const searchAllocationSN = () => {
   });
 };
 
+const editSNCount = () => {
+  if (selectedUser.value === "") {
+    ElMessage.warning("请选择用户！");
+    return;
+  }
+  const data = {
+    user_uid: userObj.value[selectedUser.value].uid,
+    length: snCount.value
+  };
+  $http.post($url.editSNCount, data).then((res) => {
+    if (res.data.code === 200) {
+      resetCheckForm();
+      usersArr.value = [];
+      SNArr.value = [];
+      searchAllocationUser();
+      searchAllocationSN();
+      ElMessage({
+        message: "修改成功！",
+        type: "success",
+      });
+    } else {
+      ElMessage.error("修改失败！");
+    }
+  });
+};
+
 const allocationSN = () => {
   if (
     selectedUser.value === "" ||