diff --git a/frontend/ruoyi-ui/src/views/business/school/index.vue b/frontend/ruoyi-ui/src/views/business/school/index.vue
index 8f7d7a2..1647c55 100644
--- a/frontend/ruoyi-ui/src/views/business/school/index.vue
+++ b/frontend/ruoyi-ui/src/views/business/school/index.vue
@@ -61,6 +61,7 @@
             :tree-props="{ children: 'children', hasChildren: 'hasChildren' }"
             :header-cell-style="{ background: '#f5f7fa', color: '#606266' }"
             style="width: 100%"
+            @expand-change="handleExpandChange"
           >
             <el-table-column prop="name" label="学校名称" min-width="200" show-overflow-tooltip />
             <el-table-column prop="schoolCode" label="学校编码" width="130" />
@@ -193,6 +194,27 @@ const handleNodeClick = (data) => {
   getSchoolTree()
 }
 
+// 表格行展开/折叠时，自动选中左侧对应区域
+const handleExpandChange = (row, expanded) => {
+  if (!expanded) return // 折叠时不处理
+  
+  // 获取区域ID：学校直接取 regionId，年级/班级需要从父级学校获取
+  let regionId = null
+  if (row.type === 'school') {
+    regionId = row.regionId
+  } else if (row.type === 'grade' || row.type === 'class') {
+    // 从 treeData 中查找所属学校的 regionId
+    const school = treeData.value.find(s => s.id === row.schoolId)
+    regionId = school?.regionId
+  }
+  
+  if (regionId) {
+    // 设置左侧区域树的选中状态（高亮）
+    treeRef.value?.setCurrentKey(regionId)
+    selectedRegionId.value = regionId
+  }
+}
+
 // 搜索
 const handleQuery = () => {
   getSchoolTree()