diff --git a/install.sh b/install.sh
index 9fc9cbc..9f1722d 100644
--- a/install.sh
+++ b/install.sh
@@ -4,7 +4,7 @@
 # Authors       : ccmywish <ccmywish@qq.com>
 #                 aifuxi   <aifuxi.js@gmail.com>
 # Created on    : <2021-01-06>
-# Last modified : <2023-05-01>
+# Last modified : <2023-05-09>
 #
 # install:
 #
@@ -13,7 +13,10 @@
 # ----------
 # Changelog:
 #
+# Note that, the '@user' represents the user id of Gitee public service.
+#
 # ~> v0.1.0
+# <2023-05-09> Check Git first by @ccmywish, idea by @zhdong_admin
 # <2023-05-01> Update nvm repo source by @ccmywish
 # <2022-11-14> Update Node.JS mirror source by @aifuxi
 # <2021-01-06> Create file by @ccmywish
@@ -22,6 +25,11 @@
 # Exit on error
 set -e
 
+if ! [ $(command -v "git") ]; then
+  echo "=> 请您首先安装Git"
+  exit 127
+fi
+
 export NVM_DIR="$HOME/.nvm" && (
   echo "=> Git clone nvm"
   git clone https://gitee.com/mirrors_nvm-sh/nvm "$NVM_DIR"