diff --git a/src/services/verification_service.py b/src/services/verification_service.py
index 10771d7..f33ed49 100644
--- a/src/services/verification_service.py
+++ b/src/services/verification_service.py
@@ -157,9 +157,18 @@ class GeometryVerificationService:
             if stderr_text:
                 logger.warning(f"验证脚本 stderr: {stderr_text[:500]}")
             
-            # 检查是否有 FreeCAD 权限错误
-            if 'Cannot read STEP file' in stderr_text or 'Cannot read STEP file' in stdout_text:
-                logger.warning("FreeCAD 无法读取文件（可能是 snap 沙盒限制），使用 PythonOCC 验证")
+            # 检查是否有 FreeCAD 错误
+            has_error = (
+                'Cannot read STEP file' in stderr_text or 
+                'Cannot read STEP file' in stdout_text or
+                'Exception while processing file' in stderr_text or
+                'Exception while processing file' in stdout_text or
+                '所有导入方法都失败' in stdout_text or
+                process.returncode != 0
+            )
+            
+            if has_error:
+                logger.warning("FreeCAD 验证失败，使用 PythonOCC 验证")
                 return self._verify_with_pythonocc_only(stp_path_str)
             
             if process.returncode == 0: