Abstract: Due to the huge, complex and interlocking characteristics of metro train control circuit, at present, the train control circuit is only drawn and saved by CAD drawing, and cannot be simulated. In view of this, this article developed a set of circuit modeling and simulation software which can draw circuit diagram and conduct dynamic simulation, so that circuit developers can carry out circuit development and verification more conveniently in the development process. In the Visual Studio programming environment, the circuit modeling and simulation system were implemented by MFC class library.