diff --git a/trojan.sh b/trojan.sh
index bb26db3..048d6ce 100644
--- a/trojan.sh
+++ b/trojan.sh
@@ -11,7 +11,7 @@ function red(){
 function version_lt(){
     test "$(echo "$@" | tr " " "\n" | sort -rV | head -n 1)" != "$1"; 
 }
-
+ 
 source /etc/os-release
 RELEASE=$ID
 VERSION=$VERSION_ID
@@ -26,7 +26,7 @@ elif [ "$RELEASE" == "ubuntu" ]; then
     systemPackage="apt-get"
 fi
 systempwd="/etc/systemd/system/"
-
+ 
 function install_trojan(){
     $systemPackage install -y nginx
     if [ ! -d "/etc/nginx/" ]; then
@@ -102,7 +102,7 @@ EOF
         mkdir /usr/src/trojan-cert/$your_domain
         ~/.acme.sh/acme.sh  --register-account  -m myemail@example.com --server zerossl
         ~/.acme.sh/acme.sh  --issue  -d $your_domain  --nginx
-        if test -s /root/.acme.sh/$your_domain/fullchain.cer; then
+        if test -s /root/.acme.sh/$your_domain_ecc/fullchain.cer; then
             cert_success="1"
         fi
     fi
@@ -286,7 +286,7 @@ EOF
     fi
 }
 function preinstall_check(){
-
+ 
     nginx_status=`ps -aux | grep "nginx: worker" |grep -v "grep"`
     if [ -n "$nginx_status" ]; then
         systemctl stop nginx
@@ -406,7 +406,7 @@ function preinstall_check(){
         fi
     fi
 }
-
+ 
 function repair_cert(){
     systemctl stop nginx
     #iptables -I INPUT -p tcp --dport 80 -j ACCEPT
@@ -427,19 +427,34 @@ function repair_cert(){
     real_addr=`ping ${your_domain} -c 1 | sed '1{s/[^(]*(//;s/).*//;q}'`
     local_addr=`curl ipv4.icanhazip.com`
     if [ $real_addr == $local_addr ] ; then
-        ~/.acme.sh/acme.sh  --register-account  -m myemail@example.com --server zerossl
-        ~/.acme.sh/acme.sh  --issue  -d $your_domain  --standalone
-        ~/.acme.sh/acme.sh  --installcert  -d  $your_domain   \
-            --key-file   /usr/src/trojan-cert/$your_domain/private.key \
-            --fullchain-file /usr/src/trojan-cert/$your_domain/fullchain.cer \
-            --reloadcmd  "systemctl restart trojan"
-        if test -s /usr/src/trojan-cert/$your_domain/fullchain.cer; then
-            green "证书申请成功"
-            systemctl restart trojan
-            systemctl start nginx
-        else
-            red "申请证书失败"
-        fi
+        if [ -f "/usr/src/trojan-cert/$your_domain/fullchain.cer" ]; then
+            cd /usr/src/trojan-cert/$your_domain
+            create_time=`stat -c %Y fullchain.cer`
+            now_time=`date +%s`
+            minus=$(($now_time - $create_time ))
+            if [  $minus -gt 5184000 ]; then
+                ~/.acme.sh/acme.sh  --register-account  -m myemail@example.com --server zerossl
+                ~/.acme.sh/acme.sh  --issue  -d $your_domain  --standalone
+                ~/.acme.sh/acme.sh  --installcert  -d  $your_domain   \
+                    --key-file   /usr/src/trojan-cert/$your_domain/private.key \
+                    --fullchain-file /usr/src/trojan-cert/$your_domain/fullchain.cer \
+                    --reloadcmd  "systemctl restart trojan"
+                if test -s /usr/src/trojan-cert/$your_domain/fullchain.cer; then
+                    green "证书申请成功"
+                    systemctl restart trojan
+                    systemctl start nginx
+                else
+                    red "申请证书失败"
+                fi
+            else 
+                ~/.acme.sh/acme.sh  --installcert  -d  $your_domain   \
+                    --key-file   /usr/src/trojan-cert/$your_domain/private.key \
+                    --fullchain-file /usr/src/trojan-cert/$your_domain/fullchain.cer \
+                    --reloadcmd  "systemctl restart trojan"
+              green "检测到域名$your_domain证书存在且未超过60天，无需重新申请"
+              cert_success="1"
+      		fi
+        fi   
     else
         red "================================"
         red "域名解析地址与本VPS IP地址不一致"
@@ -447,7 +462,7 @@ function repair_cert(){
         red "================================"
     fi
 }
-
+ 
 function remove_trojan(){
     red "================================"
     red "即将卸载trojan"
@@ -475,7 +490,7 @@ function remove_trojan(){
     green "trojan删除完毕"
     green "=============="
 }
-
+ 
 function update_trojan(){
     /usr/src/trojan/trojan -v 2>trojan.tmp
     curr_version=`cat trojan.tmp | grep "trojan" | awk '{print $4}'`
@@ -500,9 +515,9 @@ function update_trojan(){
    
    
 }
-
+ 
 function install_acme(){
-    file_path="~/.acme.sh/acme.sh/"
+    file_path="/root/.acme.sh/acme.sh"
     if [ -f "$file_path" ]
     then
         red "$file_path 已存在"
@@ -511,7 +526,7 @@ function install_acme(){
         curl https://get.acme.sh | sh
     fi
 }
-
+ 
 start_menu(){
     clear
     green " ======================================="
@@ -557,5 +572,5 @@ start_menu(){
     ;;
     esac
 }
-
-start_menu
+ 
+start_menu
\ No newline at end of file