diff --git a/lib/models/batch_rename.dart b/lib/models/batch_rename.dart
index 301ddfa..e8ecacf 100644
--- a/lib/models/batch_rename.dart
+++ b/lib/models/batch_rename.dart
@@ -4,6 +4,9 @@ enum BatchRenameRuleKind { remove, replace, regex, prefix, suffix }
 
 enum BatchRenameItemType { all, files, folders }
 
+/// How a rename rule handles a destination that is already occupied.
+enum BatchRenameConflictStrategy { reject, appendIndex }
+
 class BatchRenameRule {
   final String id;
   final bool enabled;
@@ -86,6 +89,8 @@ List<BatchRenamePreview> buildRenamePreviews(
   List<CloudFile> files,
   List<BatchRenameRule> rules, {
   required bool preserveExtension,
+  BatchRenameConflictStrategy conflictStrategy =
+      BatchRenameConflictStrategy.reject,
 }) {
   final values = <BatchRenamePreview>[];
   for (final file in files) {
@@ -116,37 +121,73 @@ List<BatchRenamePreview> buildRenamePreviews(
       );
     }
   }
-  final proposed = <String, int>{};
   final existing = <String, Set<String>>{};
   for (final file in files) {
     final key = _destinationKey(file.cloudPath, file.name);
     (existing[key] ??= <String>{}).add(file.id);
   }
+  final reserved = <String, Set<String>>{
+    for (final entry in existing.entries) entry.key: {...entry.value},
+  };
+  final proposedCounts = <String, int>{};
   for (final item in values.where((item) => item.applicable)) {
     final key = _destinationKey(item.file.cloudPath, item.newName);
-    proposed[key] = (proposed[key] ?? 0) + 1;
+    proposedCounts[key] = (proposedCounts[key] ?? 0) + 1;
   }
-  return values.map((item) {
-    if (!item.applicable) return item;
-    final key = _destinationKey(item.file.cloudPath, item.newName);
-    if (proposed[key] != null && proposed[key]! > 1) {
-      return BatchRenamePreview(
-        file: item.file,
-        newName: item.newName,
-        error: '规则产生同名项目',
-      );
+  final result = <BatchRenamePreview>[];
+  for (final item in values) {
+    if (!item.applicable) {
+      result.add(item);
+      continue;
     }
-    if (existing[key]?.any((id) => id != item.file.id) ?? false) {
-      return BatchRenamePreview(
-        file: item.file,
-        newName: item.newName,
-        error: '目标名称已存在',
+    var targetName = item.newName;
+    var targetKey = _destinationKey(item.file.cloudPath, targetName);
+    if (conflictStrategy == BatchRenameConflictStrategy.reject &&
+        proposedCounts[targetKey]! > 1) {
+      result.add(
+        BatchRenamePreview(
+          file: item.file,
+          newName: item.newName,
+          error: '规则产生同名项目',
+        ),
       );
+      continue;
     }
-    return item;
-  }).toList();
+    bool conflicts() =>
+        reserved[targetKey]?.any((id) => id != item.file.id) ?? false;
+    if (conflicts() &&
+        conflictStrategy == BatchRenameConflictStrategy.appendIndex) {
+      var index = 2;
+      do {
+        targetName = _appendIndex(item.newName, index++);
+        targetKey = _destinationKey(item.file.cloudPath, targetName);
+      } while (conflicts());
+    }
+    if (conflicts()) {
+      result.add(
+        BatchRenamePreview(
+          file: item.file,
+          newName: item.newName,
+          error: '规则产生同名项目或目标名称已存在',
+        ),
+      );
+      continue;
+    }
+    (reserved[targetKey] ??= <String>{}).add(item.file.id);
+    result.add(BatchRenamePreview(file: item.file, newName: targetName));
+  }
+  return result;
 }
 
+String _appendIndex(String name, int index) {
+  final dot = name.lastIndexOf('.');
+  if (dot > 0) {
+    return '${name.substring(0, dot)} ($index)${name.substring(dot)}';
+  }
+  return '$name ($index)';
+}
+
+/// Collision scope is a single cloud directory, never the whole drive.
 String _destinationKey(String path, String name) {
   final separator = path.lastIndexOf('/');
   final parent = separator < 0 ? '' : path.substring(0, separator);
diff --git a/lib/pages/workspace_tools_page.dart b/lib/pages/workspace_tools_page.dart
index 203dc8a..172f7bf 100644
--- a/lib/pages/workspace_tools_page.dart
+++ b/lib/pages/workspace_tools_page.dart
@@ -741,6 +741,8 @@ class _BatchRenameToolState extends ConsumerState<_BatchRenameTool> {
   int _total = 0;
   String _status = '';
   BatchRenameItemType _itemType = BatchRenameItemType.all;
+  BatchRenameConflictStrategy _conflictStrategy =
+      BatchRenameConflictStrategy.reject;
   final _selectedIDs = <String>{};
   late List<CloudFile> _candidates;
   late String? _sourceID;
@@ -753,11 +755,17 @@ class _BatchRenameToolState extends ConsumerState<_BatchRenameTool> {
   void initState() {
     super.initState();
     final state = ref.read(fileProvider);
-    _candidates = state.clipboard ?? state.files;
     _sourceID = state.folderPath.isEmpty ? null : state.folderPath.last.id;
     _sourceLabel = state.folderPath.isEmpty
         ? '云盘根目录'
         : state.folderPath.map((folder) => folder.name).join(' / ');
+    _candidates = (state.clipboard ?? state.files)
+        .map(
+          (file) => file.copyWith(
+            cloudPath: _fullCloudPath(file.cloudPath, fallbackName: file.name),
+          ),
+        )
+        .toList();
     _rules = [
       const BatchRenameRule(id: 'rule-0', kind: BatchRenameRuleKind.replace),
     ];
@@ -786,6 +794,17 @@ class _BatchRenameToolState extends ConsumerState<_BatchRenameTool> {
     });
   }
 
+  String _fullCloudPath(String path, {required String fallbackName}) {
+    final value = path.trim().isEmpty ? fallbackName : path.trim();
+    if (value.startsWith('/')) return value;
+    final source = _sourceLabel == '云盘根目录'
+        ? ''
+        : _sourceLabel.split(' / ').join('/');
+    if (source.isEmpty) return '/$value';
+    if (value == source || value.startsWith('$source/')) return '/$value';
+    return '/$source/$value';
+  }
+
   Future<void> _pickSource() async {
     final selection = await showShadDialog<_BatchRenameFolderSelection>(
       context: context,
@@ -820,7 +839,9 @@ class _BatchRenameToolState extends ConsumerState<_BatchRenameTool> {
           final path = node.path.isEmpty
               ? child.name
               : '${node.path}/${child.name}';
-          final candidate = child.copyWith(cloudPath: path);
+          final candidate = child.copyWith(
+            cloudPath: _fullCloudPath(path, fallbackName: child.name),
+          );
           result.add(candidate);
           if (_recursive &&
               candidate.isDirectory &&
@@ -941,6 +962,7 @@ class _BatchRenameToolState extends ConsumerState<_BatchRenameTool> {
       files,
       _rules,
       preserveExtension: _preserveExtension,
+      conflictStrategy: _conflictStrategy,
     );
     final filterText = _filter.text.trim().toLowerCase();
     final previews = allPreviews.where((preview) {
@@ -989,6 +1011,27 @@ class _BatchRenameToolState extends ConsumerState<_BatchRenameTool> {
                     },
                   ),
                 ),
+                SizedBox(
+                  width: 152,
+                  child: ShadSelect<BatchRenameConflictStrategy>(
+                    key: ValueKey(_conflictStrategy),
+                    initialValue: _conflictStrategy,
+                    selectedOptionBuilder: (_, value) =>
+                        Text(_conflictStrategyLabel(value)),
+                    options: [
+                      for (final value in BatchRenameConflictStrategy.values)
+                        ShadOption(
+                          value: value,
+                          child: Text(_conflictStrategyLabel(value)),
+                        ),
+                    ],
+                    onChanged: (value) {
+                      if (value != null) {
+                        setState(() => _conflictStrategy = value);
+                      }
+                    },
+                  ),
+                ),
                 SizedBox(
                   width: 220,
                   child: ShadInput(
@@ -1206,6 +1249,12 @@ String _itemTypeLabel(BatchRenameItemType value) => switch (value) {
   BatchRenameItemType.folders => '仅文件夹',
 };
 
+String _conflictStrategyLabel(BatchRenameConflictStrategy value) =>
+    switch (value) {
+      BatchRenameConflictStrategy.reject => '同名：阻止执行',
+      BatchRenameConflictStrategy.appendIndex => '同名：自动编号',
+    };
+
 String _ruleKindLabel(BatchRenameRuleKind value) => switch (value) {
   BatchRenameRuleKind.remove => '删除字符',
   BatchRenameRuleKind.replace => '查找替换',
diff --git a/test/batch_rename_test.dart b/test/batch_rename_test.dart
new file mode 100644
index 0000000..869f3aa
--- /dev/null
+++ b/test/batch_rename_test.dart
@@ -0,0 +1,61 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:guangya_flutter/models/batch_rename.dart';
+import 'package:guangya_flutter/models/cloud_file.dart';
+
+CloudFile _file(String id, String name, {String folder = '/媒体'}) => CloudFile(
+  id: id,
+  name: name,
+  isDirectory: false,
+  cloudPath: '$folder/$name',
+);
+
+void main() {
+  const collapseNames = BatchRenameRule(
+    id: 'collapse',
+    kind: BatchRenameRuleKind.regex,
+    pattern: r'\d+',
+  );
+
+  test('rejects rule-generated names that collide in one folder', () {
+    final previews = buildRenamePreviews(
+      [_file('1', 'Episode 01.mkv'), _file('2', 'Episode 02.mkv')],
+      [collapseNames],
+      preserveExtension: true,
+    );
+
+    expect(previews.every((item) => item.error != null), isTrue);
+    expect(previews.first.error, contains('同名'));
+  });
+
+  test('adds stable indexes for rule-generated duplicate names', () {
+    final previews = buildRenamePreviews(
+      [_file('1', 'Episode 01.mkv'), _file('2', 'Episode 02.mkv')],
+      [collapseNames],
+      preserveExtension: true,
+      conflictStrategy: BatchRenameConflictStrategy.appendIndex,
+    );
+
+    expect(previews.map((item) => item.newName), [
+      'Episode .mkv',
+      'Episode  (2).mkv',
+    ]);
+    expect(previews.every((item) => item.applicable), isTrue);
+  });
+
+  test('allows the same generated name in separate cloud directories', () {
+    final previews = buildRenamePreviews(
+      [
+        _file('1', 'Episode 01.mkv', folder: '/电视剧/第一季'),
+        _file('2', 'Episode 02.mkv', folder: '/电视剧/第二季'),
+      ],
+      [collapseNames],
+      preserveExtension: true,
+    );
+
+    expect(previews.map((item) => item.newName), [
+      'Episode .mkv',
+      'Episode .mkv',
+    ]);
+    expect(previews.every((item) => item.applicable), isTrue);
+  });
+}