diff --git a/docutranslate/app.py b/docutranslate/app.py
index 104fc82..507ea19 100644
--- a/docutranslate/app.py
+++ b/docutranslate/app.py
@@ -20,13 +20,14 @@ from fastapi.responses import HTMLResponse, JSONResponse, StreamingResponse, Fil
 from fastapi.staticfiles import StaticFiles
 from pydantic import BaseModel, Field
 
-from docutranslate.global_values.conditional_import import DOCLING_FLAG
+from docutranslate.global_values.conditional_import import DOCLING_EXIST
 # --- 核心代码重构后的新 Imports ---
 from docutranslate.manager.base_manager import BaseManager
+from docutranslate.manager.interfaces import HTMLExportable, MDFormatsExportable, TXTExportable
 from docutranslate.manager.md_based_manager import MarkdownBasedManager
 from docutranslate.manager.txt_manager import TXTManager
-from docutranslate.manager.interfaces import HTMLExportable, MDFormatsExportable, TXTExportable
-if DOCLING_FLAG or TYPE_CHECKING:
+
+if DOCLING_EXIST or TYPE_CHECKING:
     from docutranslate.converter.x2md.converter_docling import ConverterDoclingConfig
 from docutranslate.converter.x2md.converter_mineru import ConverterMineruConfig
 from docutranslate.exporter.md2x.md2html_exporter import MD2HTMLExportConfig
@@ -37,7 +38,6 @@ from docutranslate.translater.txt_translator import TXTTranslateConfig
 # ------------------------------------
 
 from docutranslate import __version__
-from docutranslate.global_values import available_packages
 from docutranslate.logger import global_logger
 from docutranslate.translater import default_params
 from docutranslate.utils.resource_utils import resource_path
@@ -908,7 +908,7 @@ async def service_content(
 async def service_get_engin_list():
     """返回可用的文档解析引擎列表。"""
     engin_list = ["mineru"]
-    if available_packages.get("docling"):
+    if DOCLING_EXIST:
         engin_list.append("docling")
     return JSONResponse(content=engin_list)
 
@@ -1115,4 +1115,4 @@ def run_app(port: int | None = None):
 
 
 if __name__ == "__main__":
-    run_app()
\ No newline at end of file
+    run_app()
diff --git a/docutranslate/exporter/md2x/types.py b/docutranslate/exporter/md2x/types.py
index 656f0c2..a483241 100644
--- a/docutranslate/exporter/md2x/types.py
+++ b/docutranslate/exporter/md2x/types.py
@@ -1,14 +1,14 @@
 from typing import Literal, TYPE_CHECKING
 
 from docutranslate.converter.x2md.converter_mineru import ConverterMineruConfig
-from docutranslate.global_values.conditional_import import DOCLING_FLAG
+from docutranslate.global_values.conditional_import import DOCLING_EXIST
 
-if DOCLING_FLAG or TYPE_CHECKING:
+if DOCLING_EXIST or TYPE_CHECKING:
     from docutranslate.converter.x2md.converter_docling import ConverterDoclingConfig
 
 convert_engin_type = Literal["mineru", "docling"]
 
-if DOCLING_FLAG or TYPE_CHECKING:
+if DOCLING_EXIST or TYPE_CHECKING:
     x2md_convert_config_type = ConverterDoclingConfig | ConverterMineruConfig
 else:
     x2md_convert_config_type = ConverterMineruConfig
diff --git a/docutranslate/global_values/conditional_import.py b/docutranslate/global_values/conditional_import.py
index 1ef31f5..6c2ad0f 100644
--- a/docutranslate/global_values/conditional_import.py
+++ b/docutranslate/global_values/conditional_import.py
@@ -12,8 +12,7 @@ def conditional_import(packagename,alias=None):
         available_packages[packagename]=True
         return True
     except ImportError:
-        # print(f"package:{packagename}不存在")
         available_packages[packagename]=False
         return False
 
-DOCLING_FLAG=conditional_import("docling")
+DOCLING_EXIST=conditional_import("docling")
diff --git a/docutranslate/manager/md_based_manager.py b/docutranslate/manager/md_based_manager.py
index 0f77f4a..da9cf8f 100644
--- a/docutranslate/manager/md_based_manager.py
+++ b/docutranslate/manager/md_based_manager.py
@@ -3,9 +3,9 @@ from pathlib import Path
 from typing import Self, Literal, overload, TYPE_CHECKING
 
 from docutranslate.cacher import md_based_convert_cacher
-from docutranslate.global_values.conditional_import import DOCLING_FLAG
+from docutranslate.global_values.conditional_import import DOCLING_EXIST
 
-if DOCLING_FLAG or TYPE_CHECKING:
+if DOCLING_EXIST or TYPE_CHECKING:
     from docutranslate.converter.x2md.converter_docling import ConverterDoclingConfig, ConverterDocling
 from docutranslate.converter.x2md.converter_identity import ConverterIdentity
 from docutranslate.converter.x2md.converter_mineru import ConverterMineruConfig, ConverterMineru
@@ -23,7 +23,7 @@ class MarkdownBasedManager(BaseManager, HTMLExportable, MDFormatsExportable):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
-        if DOCLING_FLAG or TYPE_CHECKING:
+        if DOCLING_EXIST or TYPE_CHECKING:
             self._converter_factory: dict[str:tuple[X2MarkdownConverter, x2md_convert_config_type]] = {
                 "mineru": (ConverterMineru, ConverterMineruConfig),
                 "docling": (ConverterDocling, ConverterDoclingConfig)