Abstract: According to the actual manufacturing situation of the roller coaster in China,Virtual collaborative design and simulation system of roller coaster based on C/S web model(VCDSSRC) is built to settle the drawbacks of traditional design,reduce the design cost and improve the safety of the products.While introducing the conception and character of VCDSSRC,six layers' architecture and function model of VCDSSRC are addressed.The roller coaster dimension-driven design subsystem for Assembly and the roller coaster virtual prototype subsystem in VCDSSRC are introduced in detail.The design subsystem is a computer interaction subsystem of roller coaster dimension-driven design for Assembly which supports collaborative design.The virtual prototype subsystem composed of the finite element platform,Collaborative Simulation platform and the evaluation platform of the safety is used to forecast and evaluate potential problems in product design,mechanical performance and machinability.Two subsystems are managed by the same database,feature database and database management system,so that data transfer efficiency and data security control are raised.At the same time,the reliability,overall performance and consistency of data transmission are preserved,and the data redundancy are reduced.