Abstract: In order to solve the problem of lack of physical display of signal equipments in the teaching of railway signal specialty in colleges and universities, taking 3D Max and Unity 3D as the development platform, and with the help of TCP/IP (Transmission Control Protocol/Internet), this paper designed a switch machine simulation operating platform to implement the station real environment simulation and 3D display of the switch machine action. The process of the switch machine state transition was displayed from different perspectives to achieve the effect reality of simulation. The platform has been put into use in the laboratory of Southwest Jiaotong University, which can meet the needs of teaching practice.