diff --git a/astrbot/core/utils/pip_installer.py b/astrbot/core/utils/pip_installer.py
index 6076a114a..663afc081 100644
--- a/astrbot/core/utils/pip_installer.py
+++ b/astrbot/core/utils/pip_installer.py
@@ -1,10 +1,29 @@
 import asyncio
+import locale
 import logging
 import sys
 
 logger = logging.getLogger("astrbot")
 
 
+def _robust_decode(line: bytes) -> str:
+    """解码字节流，兼容不同平台的编码"""
+    try:
+        return line.decode("utf-8").strip()
+    except UnicodeDecodeError:
+        pass
+    try:
+        return line.decode(locale.getpreferredencoding(False)).strip()
+    except UnicodeDecodeError:
+        pass
+    if sys.platform.startswith("win"):
+        try:
+            return line.decode("gbk").strip()
+        except UnicodeDecodeError:
+            pass
+    return line.decode("utf-8", errors="replace").strip()
+
+
 class PipInstaller:
     def __init__(self, pip_install_arg: str, pypi_index_url: str | None = None):
         self.pip_install_arg = pip_install_arg
@@ -42,7 +61,7 @@ async def install(
 
             assert process.stdout is not None
             async for line in process.stdout:
-                logger.info(line.decode().strip())
+                logger.info(_robust_decode(line))
 
             await process.wait()