Abstract: The klippes in the Longmen Mountains are arranged in a narrow zone east of the Yingxiu-Beichuan fault.A new model for the formation and evolution of the klippes is proposed on the basis of field investigation and seismic interpretation.The author contends that the klippes resulted from the thrusting,followed by the gliding-thrusting.The Yingxiu-Beichuan fault has played an important part in the formation of the klippes in the Longmen Mountains.