In view of simulation analysis of kinematics and dynamics for working process of the clutch based on ADAMS, the press curve of spring and separation claw and the press curve of push plate are figured out，thus the asking and solving the sliding friction work in the friction process is also calculated through analyzing the press of spring and separation claw. Then, it uses the multi-body particle system kinematics theory to analyze the process of the slipping and friction of the clutch. Finally, the final result is gained by comparing the analysis result of theory and ADAMS simulation which matches each other very well.