Abstract: In order to implement data consistency,interoperability and to resolve conflicts in collaborative design for complex product,a system architecture based on HLA for collaborative design environment was constructed.Design federate,management federate and monitoring federate with different authorities and functions were defined respectively.Based on the architecture,time management strategy of every federate and global time advancing process of the federation were introduced.Meanwhile,the implement process of floor control by utilizing federate authority and ownership management service was described particularly.Using the methods above,data consistency and event time sequence are ensured,and conflict operations are effectively avoided.Finally,the prototype system and application scheme were provided.