Aiming at the urgent need of portable,miniaturized recon equipment fits for all kinds of terrain,a four-leg recon robot is designed based on the perspective of bionics. At first,the structures of robot,such as legs,support,shell and other parts are completed after choosing the whole symmetric structure of outside elbow and inside knee. Then,the design and description of its leg support,transmission,shock absorption and joint-driving functions are carried out. At last,the kinematics analysis of the movement of leg joints,robot body and the tip of the leg and the dynamics analysis of jogging gait are carried out through dynamics simulation software,it is proved that this robot could meet the requirement of stability of motion and velocity of recon equipment.