The experimental platform for planar mechanism design and analysis presented in this paper is an experimental platform which can be widely used in designing and opening experiments in major universities throughout the country. The experimental platform can realize that most of the planar mechanisms at any size are stably installed on the experimental platform, and the corresponding experimental data are obtained after the smooth operation of the motor. Experimental platform with the existing platform can be compared with the size of the components change support beam and the supporting upright position can be changed, and the use of 3D printing technology to print out the experimenter independent component, the platform does not provide any component, ensure the independent design and open. This paper introduces the experiment platform of plane mechanism.