Abstract: LNG industrial chain is a complicated and systematic engineering. In order to find out the short board links and avoid the risks in the running and management process of LNG industrial chain, LNG production logistics system should be optimized and designed by dynamic simulation. Witness software can be used for secondary development in LNG industrial chain dynamic simulation by comprehending the definition of systematic simulation, comparing and selecting the software which can be used to simulated LNG industrial chain. The complete model structure of LNG industrial chain dynamic simulation system is drawn in the article, and Witness software is secondarily developed by programming language, and the developing idea and method are introduced. The established dynamic simulation platform is tested, and the bottleneck problem and settlement is put forward in the secondary development and application. Finally the application prospect and direction of LNG industrial chain dynamic simulation platform in future is proposed.