diff --git a/src/components/dialog/DownloaderInfoDialog.vue b/src/components/dialog/DownloaderInfoDialog.vue
index 826ebc1f..5d2d9d8a 100644
--- a/src/components/dialog/DownloaderInfoDialog.vue
+++ b/src/components/dialog/DownloaderInfoDialog.vue
@@ -117,9 +117,20 @@ function generateId() {
   return Math.random().toString(36).substring(2, 9)
 }
 
+/** 初始化下载器新增配置项的兼容默认值。 */
+function initializeDownloaderConfigDefaults() {
+  if (!['qbittorrent', 'transmission'].includes(downloaderInfo.value.type)) return
+  if (!downloaderInfo.value.config) downloaderInfo.value.config = {}
+  if (downloaderInfo.value.type === 'qbittorrent' && downloaderInfo.value.config.incomplete_files_ext === undefined)
+    downloaderInfo.value.config.incomplete_files_ext = true
+  if (downloaderInfo.value.type === 'transmission' && downloaderInfo.value.config.rename_partial_files === undefined)
+    downloaderInfo.value.config.rename_partial_files = true
+}
+
 /** 初始化下载器编辑表单数据。 */
 function initializeDownloaderInfo() {
   downloaderInfo.value = cloneDeep(props.downloader)
+  initializeDownloaderConfigDefaults()
   pathMappingRows.value = (downloaderInfo.value.path_mapping || []).map(item => ({
     id: generateId(),
     storage: item[0],
@@ -299,6 +310,15 @@ onMounted(() => {
                   active
                 />
               </VCol>
+              <VCol cols="12" md="6">
+                <VSwitch
+                  v-model="downloaderInfo.config.incomplete_files_ext"
+                  :label="t('downloader.incomplete_files_ext')"
+                  :hint="t('downloader.incomplete_files_extHint')"
+                  persistent-hint
+                  active
+                />
+              </VCol>
             </VRow>
             <VRow v-else-if="downloaderInfo.type == 'transmission'">
               <VCol cols="12" md="6">
@@ -344,6 +364,15 @@ onMounted(() => {
                   prepend-inner-icon="mdi-lock"
                 />
               </VCol>
+              <VCol cols="12" md="6">
+                <VSwitch
+                  v-model="downloaderInfo.config.rename_partial_files"
+                  :label="t('downloader.rename_partial_files')"
+                  :hint="t('downloader.rename_partial_filesHint')"
+                  persistent-hint
+                  active
+                />
+              </VCol>
             </VRow>
             <VRow v-else-if="downloaderInfo.type == 'rtorrent'">
               <VCol cols="12" md="6">
diff --git a/src/locales/en-US.ts b/src/locales/en-US.ts
index 6a42bd60..c5584677 100644
--- a/src/locales/en-US.ts
+++ b/src/locales/en-US.ts
@@ -3267,6 +3267,10 @@ export default {
     sequentail: 'Sequential Download',
     force_resume: 'Force Resume',
     first_last_piece: 'First/Last Piece Priority',
+    incomplete_files_ext: 'Incomplete File Suffix',
+    incomplete_files_extHint: 'Append .!qB while downloading and remove it after completion',
+    rename_partial_files: 'Incomplete File Suffix',
+    rename_partial_filesHint: 'Append .part while downloading and remove it after completion',
     saveSuccess: 'Downloader settings saved successfully',
     saveFailed: 'Failed to save downloader settings',
     nameRequired: 'Name cannot be empty',
diff --git a/src/locales/zh-CN.ts b/src/locales/zh-CN.ts
index 7dfc2ce9..9e8e691d 100644
--- a/src/locales/zh-CN.ts
+++ b/src/locales/zh-CN.ts
@@ -3210,6 +3210,10 @@ export default {
     sequentail: '顺序下载',
     force_resume: '强制继续',
     first_last_piece: '优先首尾文件',
+    incomplete_files_ext: '未完成文件后缀',
+    incomplete_files_extHint: '下载未完成时追加 .!qB 后缀，完成后自动移除',
+    rename_partial_files: '未完成文件后缀',
+    rename_partial_filesHint: '下载未完成时追加 .part 后缀，完成后自动移除',
     saveSuccess: '下载器设置保存成功',
     saveFailed: '下载器设置保存失败',
     nameRequired: '不能为空，且不能重名',
diff --git a/src/locales/zh-TW.ts b/src/locales/zh-TW.ts
index 098a346f..3c763b13 100644
--- a/src/locales/zh-TW.ts
+++ b/src/locales/zh-TW.ts
@@ -3209,6 +3209,10 @@ export default {
     sequentail: '順序下載',
     force_resume: '強制繼續',
     first_last_piece: '優先首尾文件',
+    incomplete_files_ext: '未完成文件後綴',
+    incomplete_files_extHint: '下載未完成時追加 .!qB 後綴，完成後自動移除',
+    rename_partial_files: '未完成文件後綴',
+    rename_partial_filesHint: '下載未完成時追加 .part 後綴，完成後自動移除',
     saveSuccess: '下載器設置保存成功',
     saveFailed: '下載器設置保存失敗',
     nameRequired: '名稱不能為空',