diff --git a/backend/ruoyi-modules/pangu-business/src/main/java/org/dromara/pangu/school/controller/PgSchoolController.java b/backend/ruoyi-modules/pangu-business/src/main/java/org/dromara/pangu/school/controller/PgSchoolController.java
index ff74a18..54cea20 100644
--- a/backend/ruoyi-modules/pangu-business/src/main/java/org/dromara/pangu/school/controller/PgSchoolController.java
+++ b/backend/ruoyi-modules/pangu-business/src/main/java/org/dromara/pangu/school/controller/PgSchoolController.java
@@ -95,8 +95,12 @@ public class PgSchoolController extends BaseController {
     @PostMapping("/grade")
     public R<Void> addSchoolGrade(@RequestBody Map<String, Object> params) {
         Long schoolId = Long.valueOf(params.get("schoolId").toString());
+        // JSON解析时数值会被解析为Integer，需要逐个转换为Long
         @SuppressWarnings("unchecked")
-        List<Long> gradeIds = (List<Long>) params.get("gradeIds");
+        List<?> rawGradeIds = (List<?>) params.get("gradeIds");
+        List<Long> gradeIds = rawGradeIds.stream()
+            .map(id -> Long.valueOf(id.toString()))
+            .toList();
         return toAjax(schoolService.addSchoolGrades(schoolId, gradeIds));
     }
 
@@ -109,8 +113,12 @@ public class PgSchoolController extends BaseController {
     public R<Void> addGradeClass(@RequestBody Map<String, Object> params) {
         Long schoolId = Long.valueOf(params.get("schoolId").toString());
         Long schoolGradeId = Long.valueOf(params.get("schoolGradeId").toString());
+        // JSON解析时数值会被解析为Integer，需要逐个转换为Long
         @SuppressWarnings("unchecked")
-        List<Long> classIds = (List<Long>) params.get("classIds");
+        List<?> rawClassIds = (List<?>) params.get("classIds");
+        List<Long> classIds = rawClassIds.stream()
+            .map(id -> Long.valueOf(id.toString()))
+            .toList();
         return toAjax(schoolService.addGradeClasses(schoolId, schoolGradeId, classIds));
     }