diff --git a/src/main/java/com/ai/da/service/impl/LibraryServiceImpl.java b/src/main/java/com/ai/da/service/impl/LibraryServiceImpl.java
index 73d17a2e..d8cd06eb 100644
--- a/src/main/java/com/ai/da/service/impl/LibraryServiceImpl.java
+++ b/src/main/java/com/ai/da/service/impl/LibraryServiceImpl.java
@@ -136,14 +136,18 @@ public class LibraryServiceImpl extends ServiceImpl<LibraryMapper, Library> impl
         // 新增分类过滤
         if (CollectionUtil.isNotEmpty(query.getClassificationIdList())) {
             List<Long> libraryIdList = new ArrayList<>();
-            for (Long classificationId : query.getClassificationIdList()) {
-                libraryIdList.addAll(classificationService.getLibraryIdListByClassificationId(classificationId));
-            }
-            if (CollectionUtil.isNotEmpty(libraryIdList)) {
-                queryWrapper.lambda().in(Library::getId, libraryIdList);
-            }else {
-                return PageBaseResponse.success(new Page<>());
+            for (int i = 0; i < query.getClassificationIdList().size(); i++) {
+                List<Long> libraryIdListByClassificationId = classificationService.getLibraryIdListByClassificationId(query.getClassificationIdList().get(i));
+                if (i == 0) {
+                    libraryIdList.addAll(libraryIdListByClassificationId);
+                }else {
+                    libraryIdList.retainAll(libraryIdListByClassificationId);
+                }
+                if (CollectionUtil.isEmpty(libraryIdList)) {
+                    return PageBaseResponse.success(new Page<>());
+                }
             }
+            queryWrapper.lambda().in(Library::getId, libraryIdList);
         }
         queryWrapper.orderByDesc("id");
         IPage<Library> page = getBaseMapper().selectPage(