Servo system is an important part of electric drives automatic control systems, and it’s an indispensable basic technology for modern industries such as industrial robots. In order to make teaching servo systems convenient and intuitive, a virtual experiment platform for servo systems based on Matlab is designed. The Simulink module and the Power systems sub-module are used to build a simulation model of the position servo system, and the GUI module is used to design the servo system visualization interface. The virtual experiment platform can be used to complete the virtual experiments of position single closed-loop, double closed-loop, and triple closed-loop control systems for commonly used servo motors. The virtual experimental results are consistent with the actual system waveforms, and this virtual experimental platform can be used to demonstrate the control and operation laws of servo systems visually and conveniently. The platform has a certain significance to improve the efficiency of the servo system analysis and enhance the teaching effect．