Abstract: Addressing the new generation application of distributed interactive simulation, designed and implemented in this paper is a system based on HLA/RTI, called YH High Performance Distributed Simulation System. The advantages are shown as follows: The HLA/RTI based software and hardware platform of distributed interactive simulation; the data distribution management scheme based on data filtering and multicast; multi time management integrated logic and physical time; the multi computer hard realtime interconnection system based on MPP communication technology; the multi media simulation representation technology in multi agent virtual environment. The system can be used in hard realtime single or multi system simulation and weak realtime multi system synthetic simulation.