diff --git a/control/VMHost.sh b/control/VMHost.sh
index 047ce23..b7e71b6 100644
--- a/control/VMHost.sh
+++ b/control/VMHost.sh
@@ -16,6 +16,8 @@ TEMPLATE_CONFIG_NAME="template.xml"
 TEMPLATE_NETWORK_NAME="template.conf"
 TEMPLATE_PATH=$MAIN_PATH/template
 CONFIG_PATH=/etc/libvirt/qemu
+KVM_CPUS=1
+KVM_MEMORY=512
 
 ERROR_INFO='
 "Usage: $0 [OPTION]..."\n
@@ -74,7 +76,7 @@ do
         -c|--cpus)
             shift
             cpus=`lscpu | awk '/^CPU\(s\):/{print $2}'`
-            vmcpus=${1:-"1"}
+            vmcpus=${1:-"$KVM_CPUS"}
             if [ $vmcpus -ge $cpus ]; then
                 echo "CPU数量不能大于系统的CPU数量,宿主机cpu数量为：$cpus"
                 exit 1
@@ -84,7 +86,7 @@ do
             ;;
         -m|--memory)
             shift
-            vmmemory=${1:-"512"}
+            vmmemory=${1:-"$KVM_MEMORY"}
             memory=`free -m | awk '/^Mem:/{print $2}'`
             if [ $vmmemory -ge $memory ]; then
                 echo "内存不能大于系统的内存,宿主机内存为：$memory"