This paper puts forward the realization of collaborative virtual environment assist in skills training system against on the CBT(computer based training) systems, which contains the problems of single-user, lack of immersion and no collaborative learning is assisted. The system designs system framework and workflows base on stratified structure idea. It proposes a rapid-modeling strategy based on model complexity to build collaborative virtual training scenarios. It uses mult-communication server technology to build the multi-user collaborative work environment. It reduces the burden of server in collaborative perception process by timing acquisition and sending data methods and meets the needs of teachers' real-time commentary and multi-user discussions by vector electronic drawing board and text messaging mechanism. It verifies the feasibility and superiority between the new system and traditional CBT by application examples.