diff --git a/src/views/student/index.vue b/src/views/student/index.vue
index 97fc103..33fc7ff 100644
--- a/src/views/student/index.vue
+++ b/src/views/student/index.vue
@@ -25,7 +25,7 @@
           </el-select>
         </el-form-item>
 
-        <el-form-item v-show="search.schoolId != 0" style="width: 145px">
+        <el-form-item v-show="search.schoolId" style="width: 145px">
           <el-select
             v-model="search.grade"
             placeholder="年级"
@@ -43,7 +43,7 @@
           </el-select>
         </el-form-item>
 
-        <el-form-item style="width: 100px" v-show="search.schoolId != 0">
+        <el-form-item style="width: 100px" v-show="search.schoolId">
           <el-select v-model="search.classId" placeholder="班级" clearable filterable>
             <el-option
               v-for="item in classList"
@@ -476,6 +476,15 @@ const gradeChange = () => {
 };
 
 const getClass = () => {
+  if (
+    search.schoolId == 0 ||
+    search.schoolId == undefined ||
+    search.grade == "" ||
+    search.grade == undefined
+  ) {
+    classList.value = [];
+    return;
+  }
   const data = {
     schoolId: search.schoolId || 0,
     graduationYear: search.graduationYear || 0,
diff --git a/src/views/teacher/index.vue b/src/views/teacher/index.vue
index 839e487..9ac9837 100644
--- a/src/views/teacher/index.vue
+++ b/src/views/teacher/index.vue
@@ -54,7 +54,7 @@
           </el-select>
         </el-form-item>
 
-        <el-form-item v-show="search.schoolId != 0" style="width: 145px">
+        <el-form-item v-show="search.schoolId" style="width: 145px">
           <el-select
             v-model="search.grade"
             placeholder="年级"
@@ -72,7 +72,7 @@
           </el-select>
         </el-form-item>
 
-        <el-form-item v-show="search.schoolId != 0" style="width: 100px">
+        <el-form-item v-show="search.schoolId" style="width: 100px">
           <el-select v-model="search.classId" placeholder="班级" clearable filterable>
             <el-option
               v-for="item in classList"
@@ -84,7 +84,7 @@
           </el-select>
         </el-form-item>
 
-        <el-form-item v-show="search.schoolId != 0" style="width: 100px">
+        <el-form-item v-show="search.schoolId" style="width: 100px">
           <el-select v-model="search.subjectId" placeholder="科目" clearable filterable>
             <el-option
               v-for="item in subjectList"
@@ -526,6 +526,15 @@ const gradeChange = () => {
 };
 
 const getClass = () => {
+  if (
+    search.schoolId == 0 ||
+    search.schoolId == undefined ||
+    search.grade == "" ||
+    search.grade == undefined
+  ) {
+    classList.value = [];
+    return;
+  }
   const data = {
     schoolId: search.schoolId || 0,
     graduationYear: search.graduationYear || 0,