diff --git a/file/testcase/file-test.sh b/file/testcase/file-test.sh
index 12cde527ed3b44bface5719de795adb7306026dd..61ebe6d0725d8549e252bcb8e5a17344cf954448 100755
--- a/file/testcase/file-test.sh
+++ b/file/testcase/file-test.sh
@@ -17,12 +17,16 @@ g_tmpdir="$(mktemp -d)"
 
 tc_setup() {
     msg "this is tc_setup"
+    #预置条件：系统正常运行，且已安装file软件包
     assert_true yum install -y file
     return 0
 }
 
 do_test() {
     msg "this is do_test"
+
+    # @测试步骤：1:创建文件a.txt，并执行file -b a.txt
+    # @预期结果：1:成功获取到a.txt的file -b结果
     assert_ture touch a.txt
     echo "test" >> a.txt
     assert_true file -b a.txt