diff --git a/server/internal/teaching_case/internal/logic/teaching_case/deleteteachingcaselogic.go b/server/internal/teaching_case/internal/logic/teaching_case/deleteteachingcaselogic.go
index 3a62d5b7..df18732f 100644
--- a/server/internal/teaching_case/internal/logic/teaching_case/deleteteachingcaselogic.go
+++ b/server/internal/teaching_case/internal/logic/teaching_case/deleteteachingcaselogic.go
@@ -37,7 +37,7 @@ func (l *DeleteTeachingCaseLogic) DeleteTeachingCase(req *types.DeleteTeachingCa
 	}
 
 	// 2. 先查询案例是否存在且未被删除（避免重复删除或删除不存在的数据）
-	_, err = l.model.FindOne(ctx, int64(req.Id))
+	_, err = l.model.FindOne(l.ctx, int64(req.Id))
 	if err != nil {
 		// 若查询不到（已删除或不存在），直接返回成功提示（避免前端困惑）
 		if err == model.ErrNotFound {