In an enterprise network,usually there are hundreds of branches,all of which need secure and reliable communications.As a highly scalable IPSec VPN solution under the network circumstance,DM VPN is used to deploylarge-scale VPN tunnel to encrypt the communication between corporate network branches.The proposed dual center dual cloud DM VPN directlyencrypts the communication in the branch networkwithout the forward process by the network center,which canreduce the cost and improves the networksecurity for medium or small scale enterprises.