diff --git a/services/api/app/main.py b/services/api/app/main.py
index e11fdfa..9010570 100644
--- a/services/api/app/main.py
+++ b/services/api/app/main.py
@@ -1,6 +1,7 @@
 import asyncio
 import hashlib
 import json
+import re
 import secrets
 import smtplib
 import ssl
@@ -729,6 +730,17 @@ def get_tts_task(task_id: UUID, user: dict = Depends(current_user), connection:
     return task_view(connection, owned_task(task_id, user, connection))
 
 
+def tts_download_name(task: dict, voice_name: str | None, mime_type: str) -> str:
+    ext = "mp3" if mime_type == "audio/mpeg" else "wav"
+    raw = unicodedata.normalize("NFC", task["text"] or "")
+    raw = re.sub(r"\s+", "", raw)
+    raw = re.sub(r'[\\/:*?"<>|]', "", raw)
+    summary = raw[:16] or "tts"
+    voice = re.sub(r'[\\/:*?"<>|]', "", voice_name or "")[:16] or "voice"
+    date = task["created_at"].strftime("%Y%m%d")
+    return f"{summary}_{voice}_{date}.{ext}"
+
+
 def audio_response(task_id: UUID, user: dict, connection: Connection, download: bool):
     task = owned_task(task_id, user, connection)
     audio = connection.execute("SELECT * FROM audio_files WHERE task_id = %s AND status = 'available'", (task_id,)).fetchone()
@@ -737,7 +749,10 @@ def audio_response(task_id: UUID, user: dict, connection: Connection, download:
     path = Path(settings.audio_storage_dir) / audio["storage_key"]
     if not path.is_file():
         raise error("AUDIO_NOT_AVAILABLE", "音频文件不可用", 404)
-    filename = f"kaotings-{task_id}.{'mp3' if audio['mime_type'] == 'audio/mpeg' else 'wav'}" if download else None
+    filename = None
+    if download:
+        voice = connection.execute("SELECT name FROM tts_voices WHERE provider_voice_id = %s", (task["provider_voice_id"],)).fetchone()
+        filename = tts_download_name(task, voice["name"] if voice else None, audio["mime_type"])
     return FileResponse(path, media_type=audio["mime_type"], filename=filename)