The bionic leg driven by artificial muscle is a new type of intelligent prosthesis,which is employed to compensate the motor function of residual limb side of lower limb amputee.The kinematic modeling and simulation research on bionic leg driven by artificial muscle was carried out.The Lagrange method was used to establish the kinematics models of the support phase and the swing phase of bionic leg,the kinematics and dynamics equations of bionic leg were derived and calculated,and the kinematics simulation was carried out based on MATLAB and Adams softwares.The research result demonstrates that the established bionic leg model driven by artificial muscle can realize the anthropomorphic gait of artificial limb.