Abstract: An ActiveXbased distributed simulation system named AgSimu was proposed in order to satisfy the requirement of MultiAgentbased autonomous system for distributed spacecraft systems.The COM/ActiveX Component was used to build all kinds of Agent，and ActiveX container was designed to act as Agent container，build up multiagent object model and manage the configuration and communication of these agents.Some different architecture of distributed agent systems can be made up and their realtime interaction and coordinated work can be simulated.By using ActiveX in Sfunction of Matlab/Simulink，the system can cooperate with models in Simulink.Therefore the closeloop simulation include controlled objects can be realized.

Key words: autonomous system, MAS, simulation system, ActiveX