diff --git a/electron/services/config.ts b/electron/services/config.ts
index 3ba3a14..2a496d6 100644
--- a/electron/services/config.ts
+++ b/electron/services/config.ts
@@ -26,6 +26,7 @@ interface ConfigSchema {
   whisperDownloadSource: string
   autoTranscribeVoice: boolean
   transcribeLanguages: string[]
+  exportDefaultConcurrency: number
 }
 
 export class ConfigService {
@@ -54,7 +55,8 @@ export class ConfigService {
         whisperModelDir: '',
         whisperDownloadSource: 'tsinghua',
         autoTranscribeVoice: false,
-        transcribeLanguages: ['zh']
+        transcribeLanguages: ['zh'],
+        exportDefaultConcurrency: 2
       }
     })
   }
diff --git a/electron/services/exportService.ts b/electron/services/exportService.ts
index 5e22b79..6df6819 100644
--- a/electron/services/exportService.ts
+++ b/electron/services/exportService.ts
@@ -78,6 +78,7 @@ export interface ExportOptions {
   txtColumns?: string[]
   sessionLayout?: 'shared' | 'per-session'
   displayNamePreference?: 'group-nickname' | 'remark' | 'nickname'
+  exportConcurrency?: number
 }
 
 const TXT_COLUMN_DEFINITIONS: Array<{ id: string; label: string }> = [
@@ -1288,6 +1289,7 @@ class ExportService {
   ): Promise<{ rows: any[]; memberSet: Map<string, { member: ChatLabMember; avatarUrl?: string }>; firstTime: number | null; lastTime: number | null }> {
     const rows: any[] = []
     const memberSet = new Map<string, { member: ChatLabMember; avatarUrl?: string }>()
+    const senderSet = new Set<string>()
     let firstTime: number | null = null
     let lastTime: number | null = null
 
@@ -1321,16 +1323,7 @@ class ExportService {
           const localId = parseInt(row.local_id || row.localId || '0', 10)
 
           const actualSender = isSend ? cleanedMyWxid : (senderUsername || sessionId)
-          const memberInfo = await this.getContactInfo(actualSender)
-          if (!memberSet.has(actualSender)) {
-            memberSet.set(actualSender, {
-              member: {
-                platformId: actualSender,
-                accountName: memberInfo.displayName
-              },
-              avatarUrl: memberInfo.avatarUrl
-            })
-          }
+          senderSet.add(actualSender)
 
           // 提取媒体相关字段
           let imageMd5: string | undefined
@@ -1375,6 +1368,30 @@ class ExportService {
       await wcdbService.closeMessageCursor(cursor.cursor)
     }
 
+    if (senderSet.size > 0) {
+      const usernames = Array.from(senderSet)
+      const [nameResult, avatarResult] = await Promise.all([
+        wcdbService.getDisplayNames(usernames),
+        wcdbService.getAvatarUrls(usernames)
+      ])
+
+      const nameMap = nameResult.success && nameResult.map ? nameResult.map : {}
+      const avatarMap = avatarResult.success && avatarResult.map ? avatarResult.map : {}
+
+      for (const username of usernames) {
+        const displayName = nameMap[username] || username
+        const avatarUrl = avatarMap[username]
+        memberSet.set(username, {
+          member: {
+            platformId: username,
+            accountName: displayName
+          },
+          avatarUrl
+        })
+        this.contactCache.set(username, { displayName, avatarUrl })
+      }
+    }
+
     return { rows, memberSet, firstTime, lastTime }
   }
 
@@ -1856,6 +1873,16 @@ class ExportService {
       const sessionInfo = await this.getContactInfo(sessionId)
       const myInfo = await this.getContactInfo(cleanedMyWxid)
 
+      const contactCache = new Map<string, { success: boolean; contact?: any; error?: string }>()
+      const getContactCached = async (username: string) => {
+        if (contactCache.has(username)) {
+          return contactCache.get(username)!
+        }
+        const result = await wcdbService.getContact(username)
+        contactCache.set(username, result)
+        return result
+      }
+
       onProgress?.({
         current: 0,
         total: 100,
@@ -1934,6 +1961,16 @@ class ExportService {
         ? await this.getGroupNicknamesForRoom(sessionId)
         : new Map<string, string>()
 
+      const contactCache = new Map<string, { success: boolean; contact?: any; error?: string }>()
+      const getContactCached = async (username: string) => {
+        if (contactCache.has(username)) {
+          return contactCache.get(username)!
+        }
+        const result = await wcdbService.getContact(username)
+        contactCache.set(username, result)
+        return result
+      }
+
       // ========== 阶段3：构建消息列表 ==========
       onProgress?.({
         current: 55,
@@ -1962,7 +1999,7 @@ class ExportService {
 
         // 获取发送者信息用于名称显示
         const senderWxid = msg.senderUsername
-        const contact = await wcdbService.getContact(senderWxid)
+        const contact = await getContactCached(senderWxid)
         const senderNickname = contact.success && contact.contact?.nickName
           ? contact.contact.nickName
           : (senderInfo.displayName || senderWxid)
@@ -2005,7 +2042,7 @@ class ExportService {
       const { chatlab, meta } = this.getExportMeta(sessionId, sessionInfo, isGroup)
 
       // 获取会话的昵称和备注信息
-      const sessionContact = await wcdbService.getContact(sessionId)
+      const sessionContact = await getContactCached(sessionId)
       const sessionNickname = sessionContact.success && sessionContact.contact?.nickName
         ? sessionContact.contact.nickName
         : sessionInfo.displayName
@@ -2098,8 +2135,18 @@ class ExportService {
       const sessionInfo = await this.getContactInfo(sessionId)
       const myInfo = await this.getContactInfo(cleanedMyWxid)
 
+      const contactCache = new Map<string, { success: boolean; contact?: any; error?: string }>()
+      const getContactCached = async (username: string) => {
+        if (contactCache.has(username)) {
+          return contactCache.get(username)!
+        }
+        const result = await wcdbService.getContact(username)
+        contactCache.set(username, result)
+        return result
+      }
+
       // 获取会话的备注信息
-      const sessionContact = await wcdbService.getContact(sessionId)
+      const sessionContact = await getContactCached(sessionId)
       const sessionRemark = sessionContact.success && sessionContact.contact?.remark ? sessionContact.contact.remark : ''
       const sessionNickname = sessionContact.success && sessionContact.contact?.nickName ? sessionContact.contact.nickName : sessionId
 
@@ -2328,7 +2375,7 @@ class ExportService {
           senderWxid = msg.senderUsername
 
           // 用 getContact 获取联系人详情，分别取昵称和备注
-          const contactDetail = await wcdbService.getContact(msg.senderUsername)
+          const contactDetail = await getContactCached(msg.senderUsername)
           if (contactDetail.success && contactDetail.contact) {
             // nickName 才是真正的昵称
             senderNickname = contactDetail.contact.nickName || msg.senderUsername
@@ -2343,7 +2390,7 @@ class ExportService {
         } else {
           // 单聊对方消息 - 用 getContact 获取联系人详情
           senderWxid = sessionId
-          const contactDetail = await wcdbService.getContact(sessionId)
+          const contactDetail = await getContactCached(sessionId)
           if (contactDetail.success && contactDetail.contact) {
             senderNickname = contactDetail.contact.nickName || sessionId
             senderRemark = contactDetail.contact.remark || ''
@@ -2567,7 +2614,7 @@ class ExportService {
           senderNickname = myInfo.displayName || cleanedMyWxid
         } else if (isGroup && msg.senderUsername) {
           senderWxid = msg.senderUsername
-          const contactDetail = await wcdbService.getContact(msg.senderUsername)
+          const contactDetail = await getContactCached(msg.senderUsername)
           if (contactDetail.success && contactDetail.contact) {
             senderNickname = contactDetail.contact.nickName || msg.senderUsername
             senderRemark = contactDetail.contact.remark || ''
@@ -2578,7 +2625,7 @@ class ExportService {
           }
         } else {
           senderWxid = sessionId
-          const contactDetail = await wcdbService.getContact(sessionId)
+          const contactDetail = await getContactCached(sessionId)
           if (contactDetail.success && contactDetail.contact) {
             senderNickname = contactDetail.contact.nickName || sessionId
             senderRemark = contactDetail.contact.remark || ''
@@ -3005,13 +3052,20 @@ class ExportService {
       const sessionLayout = exportMediaEnabled
         ? (options.sessionLayout ?? 'per-session')
         : 'shared'
+      let completedCount = 0
+      const rawConcurrency = typeof options.exportConcurrency === 'number'
+        ? Math.floor(options.exportConcurrency)
+        : 2
+      const clampedConcurrency = Math.max(1, Math.min(rawConcurrency, 6))
+      const sessionConcurrency = (exportMediaEnabled && sessionLayout === 'shared')
+        ? 1
+        : clampedConcurrency
 
-      for (let i = 0; i < sessionIds.length; i++) {
-        const sessionId = sessionIds[i]
+      await parallelLimit(sessionIds, sessionConcurrency, async (sessionId) => {
         const sessionInfo = await this.getContactInfo(sessionId)
 
         onProgress?.({
-          current: i + 1,
+          current: completedCount,
           total: sessionIds.length,
           currentSession: sessionInfo.displayName,
           phase: 'exporting'
@@ -3053,7 +3107,15 @@ class ExportService {
           failCount++
           console.error(`导出 ${sessionId} 失败:`, result.error)
         }
-      }
+
+        completedCount++
+        onProgress?.({
+          current: completedCount,
+          total: sessionIds.length,
+          currentSession: sessionInfo.displayName,
+          phase: 'exporting'
+        })
+      })
 
       onProgress?.({
         current: sessionIds.length,
diff --git a/src/pages/ExportPage.tsx b/src/pages/ExportPage.tsx
index d1f5bad..a8872cd 100644
--- a/src/pages/ExportPage.tsx
+++ b/src/pages/ExportPage.tsx
@@ -24,6 +24,7 @@ interface ExportOptions {
   excelCompactColumns: boolean
   txtColumns: string[]
   displayNamePreference: 'group-nickname' | 'remark' | 'nickname'
+  exportConcurrency: number
 }
 
 interface ExportResult {
@@ -68,7 +69,8 @@ function ExportPage() {
     exportVoiceAsText: true,
     excelCompactColumns: true,
     txtColumns: defaultTxtColumns,
-    displayNamePreference: 'remark'
+    displayNamePreference: 'remark',
+    exportConcurrency: 2
   })
 
   const buildDateRangeFromPreset = (preset: string) => {
@@ -133,14 +135,16 @@ function ExportPage() {
         savedMedia,
         savedVoiceAsText,
         savedExcelCompactColumns,
-        savedTxtColumns
+        savedTxtColumns,
+        savedConcurrency
       ] = await Promise.all([
         configService.getExportDefaultFormat(),
         configService.getExportDefaultDateRange(),
         configService.getExportDefaultMedia(),
         configService.getExportDefaultVoiceAsText(),
         configService.getExportDefaultExcelCompactColumns(),
-        configService.getExportDefaultTxtColumns()
+        configService.getExportDefaultTxtColumns(),
+        configService.getExportDefaultConcurrency()
       ])
 
       const preset = savedRange || 'today'
@@ -155,7 +159,8 @@ function ExportPage() {
         exportMedia: savedMedia ?? false,
         exportVoiceAsText: savedVoiceAsText ?? true,
         excelCompactColumns: savedExcelCompactColumns ?? true,
-        txtColumns
+        txtColumns,
+        exportConcurrency: savedConcurrency ?? 2
       }))
     } catch (e) {
       console.error('加载导出默认设置失败:', e)
@@ -286,6 +291,7 @@ function ExportPage() {
         excelCompactColumns: options.excelCompactColumns,
         txtColumns: options.txtColumns,
         displayNamePreference: options.displayNamePreference,
+        exportConcurrency: options.exportConcurrency,
         sessionLayout,
         dateRange: options.useAllTime ? null : options.dateRange ? {
           start: Math.floor(options.dateRange.start.getTime() / 1000),
diff --git a/src/pages/SettingsPage.tsx b/src/pages/SettingsPage.tsx
index 8bd2d45..177a9fd 100644
--- a/src/pages/SettingsPage.tsx
+++ b/src/pages/SettingsPage.tsx
@@ -62,6 +62,7 @@ function SettingsPage() {
   const [exportDefaultMedia, setExportDefaultMedia] = useState(false)
   const [exportDefaultVoiceAsText, setExportDefaultVoiceAsText] = useState(true)
   const [exportDefaultExcelCompactColumns, setExportDefaultExcelCompactColumns] = useState(true)
+  const [exportDefaultConcurrency, setExportDefaultConcurrency] = useState(2)
 
   const [isLoading, setIsLoadingState] = useState(false)
   const [isTesting, setIsTesting] = useState(false)
@@ -139,6 +140,7 @@ function SettingsPage() {
       const savedExportDefaultMedia = await configService.getExportDefaultMedia()
       const savedExportDefaultVoiceAsText = await configService.getExportDefaultVoiceAsText()
       const savedExportDefaultExcelCompactColumns = await configService.getExportDefaultExcelCompactColumns()
+      const savedExportDefaultConcurrency = await configService.getExportDefaultConcurrency()
 
       if (savedPath) setDbPath(savedPath)
       if (savedWxid) setWxid(savedWxid)
@@ -166,6 +168,7 @@ function SettingsPage() {
       setExportDefaultMedia(savedExportDefaultMedia ?? false)
       setExportDefaultVoiceAsText(savedExportDefaultVoiceAsText ?? true)
       setExportDefaultExcelCompactColumns(savedExportDefaultExcelCompactColumns ?? true)
+      setExportDefaultConcurrency(savedExportDefaultConcurrency ?? 2)
 
       // 如果语言列表为空，保存默认值
       if (!savedTranscribeLanguages || savedTranscribeLanguages.length === 0) {
@@ -1113,6 +1116,32 @@ function SettingsPage() {
         </div>
       </div>
 
+      
+      <div className="form-group">
+        <label>???????????</label>
+        <span className="form-hint">?????????????????? 1-3</span>
+        <input
+          type="number"
+          min={1}
+          max={6}
+          value={exportDefaultConcurrency}
+          onChange={(e) => {
+            const value = Number(e.target.value)
+            if (Number.isNaN(value)) {
+              setExportDefaultConcurrency(1)
+              return
+            }
+            setExportDefaultConcurrency(value)
+          }}
+          onBlur={async () => {
+            const clamped = Math.max(1, Math.min(Math.floor(exportDefaultConcurrency || 1), 6))
+            setExportDefaultConcurrency(clamped)
+            await configService.setExportDefaultConcurrency(clamped)
+            showMessage(`?????????????? ${clamped}`, true)
+          }}
+        />
+      </div>
+
       <div className="form-group">
         <label>Excel 列显示</label>
         <span className="form-hint">控制 Excel 导出的列字段</span>
diff --git a/src/services/config.ts b/src/services/config.ts
index 063ff68..fe0153e 100644
--- a/src/services/config.ts
+++ b/src/services/config.ts
@@ -29,7 +29,8 @@ export const CONFIG_KEYS = {
   EXPORT_DEFAULT_MEDIA: 'exportDefaultMedia',
   EXPORT_DEFAULT_VOICE_AS_TEXT: 'exportDefaultVoiceAsText',
   EXPORT_DEFAULT_EXCEL_COMPACT_COLUMNS: 'exportDefaultExcelCompactColumns',
-  EXPORT_DEFAULT_TXT_COLUMNS: 'exportDefaultTxtColumns'
+  EXPORT_DEFAULT_TXT_COLUMNS: 'exportDefaultTxtColumns',
+  EXPORT_DEFAULT_CONCURRENCY: 'exportDefaultConcurrency'
 } as const
 
 export interface WxidConfig {
@@ -352,3 +353,15 @@ export async function getExportDefaultTxtColumns(): Promise<string[] | null> {
 export async function setExportDefaultTxtColumns(columns: string[]): Promise<void> {
   await config.set(CONFIG_KEYS.EXPORT_DEFAULT_TXT_COLUMNS, columns)
 }
+
+// 获取导出默认并发数
+export async function getExportDefaultConcurrency(): Promise<number | null> {
+  const value = await config.get(CONFIG_KEYS.EXPORT_DEFAULT_CONCURRENCY)
+  if (typeof value === 'number' && Number.isFinite(value)) return value
+  return null
+}
+
+// 设置导出默认并发数
+export async function setExportDefaultConcurrency(concurrency: number): Promise<void> {
+  await config.set(CONFIG_KEYS.EXPORT_DEFAULT_CONCURRENCY, concurrency)
+}
diff --git a/src/types/electron.d.ts b/src/types/electron.d.ts
index 2622cce..3f48a8d 100644
--- a/src/types/electron.d.ts
+++ b/src/types/electron.d.ts
@@ -365,6 +365,7 @@ export interface ExportOptions {
   txtColumns?: string[]
   sessionLayout?: 'shared' | 'per-session'
   displayNamePreference?: 'group-nickname' | 'remark' | 'nickname'
+  exportConcurrency?: number
 }
 
 export interface ExportProgress {