Abstract
The paper presents a three-dimensional train group operation simulation system, which is designed depending on the existed definition of train operation Petri net with objects (TOPNO). The structure of the simulation system possesses the characteristics of owning several separated layers, which ensure the independence of any logical unit and make the system extensible. It has small scale and the advantages in flexibility, modularization and operability etc. Compared the existed traditional two-dimension train group operation simulation system, the system is obvious, flexible and can be better operated and supply more information. At the end of the paper, it is educed that this system can be applied in virtual reality, can verify the feasibility of the train operation graph and can be adopted as the experimental platform of the railway intelligent transportation system, etc.