diff --git a/app/src/main/cpp/SensorsProtocol.cpp b/app/src/main/cpp/SensorsProtocol.cpp
index 2bae3995..a54939f8 100644
--- a/app/src/main/cpp/SensorsProtocol.cpp
+++ b/app/src/main/cpp/SensorsProtocol.cpp
@@ -1687,7 +1687,7 @@ int SaveLogTofile(int commid, char *szbuf)
 	}
 	// 写入文件到sdcard
 	memset(filename, 0, sizeof(filename));
-	sprintf(filename, "%sCOM%dlog-%04d-%02d-%02d.log", filedir, commid + 1, t0.tm_year + 1900, t0.tm_mon + 1, t0.tm_mday);
+	sprintf(filename, "%sCOM%dlog-%04d-%02d-%02d.txt", filedir, commid + 1, t0.tm_year + 1900, t0.tm_mon + 1, t0.tm_mday);
 	fp = fopen(filename, "a+");
 	if (NULL == fp)
 		return -1;