Abstract: In this paper, a cooperative work environment oriented to distributed virtual design is established to provide information sharing, collaboration and conflict resolution. The CORBA based multi-tier structure of the system architecture model is presented and the study method to the system is introduced. The technical connotation, executive flow and implementation of the entity real-time communication protocol based on TCP/IP and Object Oriented RTTI are introduced in detail. The model is used to maintain the consistency of geometrical model on entity level between different network nodes. The concurrency problem of distributed virtual design is discussed, and some conflict problem is resolved by locking entity, with several arbitration methods on the locking entity compared.