Abstract: A data reverse design method and the reverse design process downswing gripper mechanism around fixed center are introduced.The technology demand for the motion law of driven member of conjugate cam mechanism is met by analyzing the reverse design results.The motion stability of paper-feeding mechanism running with a high speed can be researched by this method.The driving cam outline that accord with the technology demand of gripper mechanism can be designed by simulating the motion law of gripper lever by using a five-order multinomial.