Abstract: Because of numerous component models and massive dataset in assembly design for complex product, common virtual assembly software can not process them in realtime mode. A new virtual reality grid environment was proposed, which uses grid resource management and shared technology to aggregate large numbers of idle resources in enterprise; uses parallel rendering framework based on Sortlast algorithm and remote video visualization to support realtime interactive assembling simulation. After taking a collaborative simulation for automotive assembling workstation, the main functions and design objectives of the system were affirmed. The result shows that the system can better solve the problem of realtime process for large complex scene in the present conditions of hardware, and observably improve the usage efficiency of enterprise resources.