Abstract: The automatic generation of the 3D models of metro line is beneficial to the rapid realization of 3D visual simulation. Based on the route plan and profile data, this paper researched on the coordinate calculation of the route path point, implemented data reading and path generation by using Unity3D and C# program and database technology, used the line renderer component and the method of generating mesh to create models such as tracks and turnouts, and simplified the 3D models of the track by the Douglas–Peucker algorithm, which effectively improved the rendering speed and frame rate, used technologies like collision detection, message broadcasting to implement virtual scene roaming and train operation simulation. The software developed based on this research can quickly construct and drive metro line models, provided a 3D visual basis for the simulation of metro operation scenarios.