Aiming at the unusual moving characteristic of the swing mechanism,a kind of moving model of the swing mechanism is built by using the mathematic modeling method,so that the expectant motion law can be obtained according to the engineering practical to change the parameter of the model.A visual prototype of the swing pump movement mechanism is built based on the ADAMS software.By the comparing the result of the motion simulation with the mathematic model,the accuracy of the parametric model is verified.Then the mechanics analysis of the critical part of swing mechanism is carried out by using the dynamics analysis method,and the theoretical basis for designing the swing mechanism is provided.