diff --git a/tosfs/consts.py b/tosfs/consts.py
index 556aac0..0ebf0ac 100644
--- a/tosfs/consts.py
+++ b/tosfs/consts.py
@@ -35,4 +35,5 @@
 
 # environment variable names
 ENV_NAME_TOSFS_LOGGING_LEVEL = "TOSFS_LOGGING_LEVEL"
+ENV_NAME_TOS_SDK_LOGGING_LEVEL = "TOS_SDK_LOGGING_LEVEL"
 ENV_NAME_TOS_BUCKET_TAG_ENABLE = "TOS_BUCKET_TAG_ENABLE"
diff --git a/tosfs/core.py b/tosfs/core.py
index 947626d..f07644e 100644
--- a/tosfs/core.py
+++ b/tosfs/core.py
@@ -39,6 +39,7 @@
 
 from tosfs.consts import (
     APPEND_OPERATION_SMALL_FILE_THRESHOLD,
+    ENV_NAME_TOS_SDK_LOGGING_LEVEL,
     ENV_NAME_TOSFS_LOGGING_LEVEL,
     FILE_OPERATION_READ_WRITE_BUFFER_SIZE,
     GET_OBJECT_OPERATION_DEFAULT_READ_CHUNK_SIZE,
@@ -75,7 +76,7 @@ def setup_logging() -> None:
     # set and config tos client's logger
     tos.set_logger(
         name="tosclient",
-        level=os.environ.get(ENV_NAME_TOSFS_LOGGING_LEVEL, "INFO"),
+        level=os.environ.get(ENV_NAME_TOS_SDK_LOGGING_LEVEL, "WARNING"),
         log_handler=logging.StreamHandler(),
         format_string=TOSFS_LOG_FORMAT,
     )