diff --git a/lib/Projectrans/Phase2Translator.py b/lib/Projectrans/Phase2Translator.py
index c054ce9..4a7bf45 100644
--- a/lib/Projectrans/Phase2Translator.py
+++ b/lib/Projectrans/Phase2Translator.py
@@ -286,21 +286,29 @@ def _CleanProfFiles() -> None:
 def _ProfileWorker(_fn):
     @_functools.wraps(_fn)
     def _wrapper(*args, **kwargs):
-        _prof: cProfile.Profile = cProfile.Profile()
-        _prof.enable()
+        _prof = None
         try:
+            # 互斥：viztracer 等外部 profiler 已激活（sys.getprofile() 非 None）时
+            # 跳过 cProfile——Python 只允许一个 profiling tool 同时活跃，
+            # cProfile.enable() 会抛 "Another profiling tool is already active"
+            # → worker 崩溃 → batch 异常 → 编译终止（viztracer --log_multiprocess 场景）。
+            # 此时让 viztracer 独占记录，正常编译（无外部 profiler）仍保留 cProfile。
+            if sys.getprofile() is None:
+                _prof = cProfile.Profile()
+                _prof.enable()
             return _fn(*args, **kwargs)
         finally:
-            _prof.disable()
-            _seq: int = getattr(_wrapper, '_seq', 0) + 1
-            _wrapper._seq = _seq
-            try:
-                if not os.path.isdir(PROF_DIR):
-                    os.makedirs(PROF_DIR, exist_ok=True)
-                _out: str = os.path.join(PROF_DIR, f'worker_prof_{os.getpid()}_{_seq}.prof')
-                _prof.dump_stats(_out)
-            except Exception:
-                pass
+            if _prof is not None:
+                _prof.disable()
+                _seq: int = getattr(_wrapper, '_seq', 0) + 1
+                _wrapper._seq = _seq
+                try:
+                    if not os.path.isdir(PROF_DIR):
+                        os.makedirs(PROF_DIR, exist_ok=True)
+                    _out: str = os.path.join(PROF_DIR, f'worker_prof_{os.getpid()}_{_seq}.prof')
+                    _prof.dump_stats(_out)
+                except Exception:
+                    pass
 
     return _wrapper