In view of the problem of gas leakage caused by excessive surface wear on the end-face of the movable scroll plate during the working process of the scroll compressor,taking a certain type of scroll compressor as the research object,the force analysis model of the end-face friction pair of the movable scroll plate was established,and the change of the load on the end-face of the movable scroll plate during the operation was analyzed.The dynamic contact stress change cloud diagram of the end-face friction pair of the movable scroll plate at different rotational speeds under typical working conditions was obtained by finite element numerical simulation.The wear coefficient of QT400,a commonly used material for the movable scroll plate,was measured on the end-face wear testing machine.The wear depth value of QT400 at different speeds was calculated by modifying the Archard wear model and combining finite element wear simulation,and an experimental plan was designed to analyze the wear mechanism of QT400 according to the material PV value principle.The results show that the faster the orbiting scroll rotates,the greater the wear depth value in the area with larger contact stress value.The wear mechanism of QT400 is mainly fatigue wear,which is continuously transformed into adhesive wear with the increase of load,accompanied by a small amount of abrasive wear.This research provides a good reference for the improvement of the scroll compressor orbiting scroll structure.