diff --git a/backend/app/transcriber/whisper.py b/backend/app/transcriber/whisper.py
index c06c749..486c774 100644
--- a/backend/app/transcriber/whisper.py
+++ b/backend/app/transcriber/whisper.py
@@ -4,14 +4,19 @@ from app.decorators.timeit import timeit
 from app.models.transcriber_model import TranscriptSegment, TranscriptResult
 from app.transcriber.base import Transcriber
 from app.utils.env_checker import is_cuda_available, is_torch_installed
+from app.utils.logger import get_logger
 from app.utils.path_helper import get_model_dir
 
 from events import transcription_finished
+from pathlib import Path
+import os
+from tqdm import tqdm
+from huggingface_hub import snapshot_download
 
 '''
  Size of the model to use (tiny, tiny.en, base, base.en, small, small.en, distil-small.en, medium, medium.en, distil-medium.en, large-v1, large-v2, large-v3, large, distil-large-v2, distil-large-v3, large-v3-turbo, or turbo
 '''
-
+logger=get_logger(__name__)
 
 class WhisperTranscriber(Transcriber):
     # TODO:修改为可配置
@@ -31,15 +36,25 @@ class WhisperTranscriber(Transcriber):
 
         self.compute_type = compute_type or ("float16" if self.device == "cuda" else "int8")
 
-        model_path = get_model_dir("whisper")
+        model_dir = get_model_dir("whisper")
+        model_path = os.path.join(model_dir, f"whisper-{model_size}")
+        if not Path(model_path).exists():
+            logger.info(f"模型 whisper-{model_size} 不存在，开始下载...")
+            repo_id = f"guillaumekln/faster-whisper-{model_size}"
+            snapshot_download(
+                repo_id,
+                local_dir=model_path,
+                local_dir_use_symlinks=False,
+            )
+            logger.info("模型下载完成")
+
         self.model = WhisperModel(
             model_size,
             device=self.device,
-            # compute_type="int8",  # 或 "float16"
+            compute_type=self.compute_type,
             cpu_threads=cpu_threads,
-            download_root=model_path
+            download_root=model_dir
         )
-
     @staticmethod
     def is_torch_installed() -> bool:
         try:
diff --git a/backend/requirements.txt b/backend/requirements.txt
index 1295fa7..166bc08 100644
Binary files a/backend/requirements.txt and b/backend/requirements.txt differ