Abstract: A lower limb exoskeleton system includes a back frame, hip joint movement mechanisms, telescopic thigh bars, knee joint movement mechanisms, shank bars, foot jump-down cushioning mechanisms, a waist binding frame, upper leg binding frames and lower leg binding frames. Two protruding ends of the back frame are connected with one end of each of the telescopic thigh bars respectively via the hip joint movement mechanisms, the other ends of the telescopic thigh bars are connected with one end of the corresponding shank bars respectively via the knee joint movement mechanisms, and the other ends of the shank bars are connected with the foot jump-down cushioning mechanisms. The waist binding frame is arranged on an inner side of a horizontal part of the back frame, and the upper leg binding frames and the lower leg binding frames are arranged on the telescopic thigh bars and the shank bars respectively.