diff --git a/src/main/java/com/yunhai/bschclassmanage/service/impl/com/ComSchTreeService.java b/src/main/java/com/yunhai/bschclassmanage/service/impl/com/ComSchTreeService.java
index 3e4610e..9e8e135 100644
--- a/src/main/java/com/yunhai/bschclassmanage/service/impl/com/ComSchTreeService.java
+++ b/src/main/java/com/yunhai/bschclassmanage/service/impl/com/ComSchTreeService.java
@@ -1091,7 +1091,7 @@ public class ComSchTreeService implements IComSchTreeService {
 
         // 8. 生成所有年份节点
         List<SchSystemTreeVO> gradeNodes = new ArrayList<>();
-        for (int year = minYear; year <= currentYear; year++) {
+        for (int year = currentYear ; year >=minYear ; year--) {
             List<SchClass> classList = classByYear.getOrDefault(year, Collections.emptyList());
             String gradeName = yearToGradeName.getOrDefault(year, year + "级");
             SchSystemTreeVO gradeNode = buildGradeNodeWithFullNameByYear(