diff --git a/fs-framework/fs-common-core/src/main/java/com/xddcodec/fs/framework/common/enums/FileTypeEnum.java b/fs-framework/fs-common-core/src/main/java/com/xddcodec/fs/framework/common/enums/FileTypeEnum.java
index 3a022d66e0c013fdcca802eaf4f29467087e9a8a..94d888350e9ee0ca8d0314e08fd2ad4dafb3e343 100644
--- a/fs-framework/fs-common-core/src/main/java/com/xddcodec/fs/framework/common/enums/FileTypeEnum.java
+++ b/fs-framework/fs-common-core/src/main/java/com/xddcodec/fs/framework/common/enums/FileTypeEnum.java
@@ -222,6 +222,20 @@ public enum FileTypeEnum {
                 .collect(Collectors.toList());
     }
 
+    /**
+     * 获取除指定分类外的所有已知后缀
+     */
+    public static List<String> getAllKnownSuffixesExcluding(FileCategory excludeCategory) {
+        return Stream.of(values())
+                .filter(type -> type != OTHER
+                        && type.getCategory() != excludeCategory
+                        && type.getSuffixes() != null)
+                .flatMap(type -> type.getSuffixes().stream())
+                .distinct()
+                .collect(Collectors.toList());
+    }
+
+
     /**
      * 判断是否为其他类型
      */
diff --git a/fs-modules/fs-file/src/main/java/com/xddcodec/fs/file/service/impl/FileInfoServiceImpl.java b/fs-modules/fs-file/src/main/java/com/xddcodec/fs/file/service/impl/FileInfoServiceImpl.java
index 7aa2a393bf213e60ad386d8e0d5b84bcc779f6e2..f4b8632e17c62e5255813b7aea54809a76c71e42 100644
--- a/fs-modules/fs-file/src/main/java/com/xddcodec/fs/file/service/impl/FileInfoServiceImpl.java
+++ b/fs-modules/fs-file/src/main/java/com/xddcodec/fs/file/service/impl/FileInfoServiceImpl.java
@@ -627,17 +627,20 @@ public class FileInfoServiceImpl extends ServiceImpl<FileInfoMapper, FileInfo> i
      * 按分类筛选
      */
     private void applyFilterByCategory(QueryWrapper wrapper, FileTypeEnum.FileCategory category) {
+        List<String> categorySuffixes = FileTypeEnum.getSuffixesByCategory(category);
+
         if (category == FileTypeEnum.FileCategory.OTHER) {
-            // 其他类型：排除所有已知后缀
-            List<String> knownSuffixes = FileTypeEnum.getAllKnownSuffixes();
+            // OTHER 分类：匹配 OTHER 分类的已知后缀 + 所有未知后缀
+            List<String> allOtherKnownSuffixes = FileTypeEnum.getAllKnownSuffixesExcluding(FileTypeEnum.FileCategory.OTHER);
+
             wrapper.and(FILE_INFO.IS_DIR.eq(false))
                     .and(
-                            FILE_INFO.SUFFIX.notIn(knownSuffixes)
+                            FILE_INFO.SUFFIX.in(categorySuffixes) // zip、rar 等
+                                    .or(FILE_INFO.SUFFIX.notIn(allOtherKnownSuffixes)) // 真正的未知类型
                                     .or(FILE_INFO.SUFFIX.isNull().or(FILE_INFO.SUFFIX.eq("")))
                     );
         } else {
-            // 常规分类：获取该分类下所有后缀
-            List<String> categorySuffixes = FileTypeEnum.getSuffixesByCategory(category);
+            // 常规分类：直接匹配后缀
             if (!categorySuffixes.isEmpty()) {
                 wrapper.and(FILE_INFO.IS_DIR.eq(false))
                         .and(FILE_INFO.SUFFIX.in(categorySuffixes));
@@ -645,6 +648,7 @@ public class FileInfoServiceImpl extends ServiceImpl<FileInfoMapper, FileInfo> i
         }
     }
 
+
     /**
      * 按具体类型筛选
      */