The present invention discloses a connecting rod-type lower limb exoskeleton rehabilitation robot, comprising a treadmill, two pneumatic muscle frames, two transmission devices and two lower limb exoskeletons； the pneumatic muscle frame includes a thigh rotating shaft, a calf rotating shaft, a hip joint shaft, pneumatic muscles and a support frame； the transmission device includes a thigh transmission mechanism and a calf transmission mechanism； the thigh transmission mechanism is a parallel four-connecting-rod mechanism composed of a thigh rotating arm, a thigh connecting rod and a thigh skeleton； the calf transmission mechanism includes two four-connecting-rod mechanisms； and the lower limb exoskeleton is connected to the pneumatic muscle frame through the transmission device. Compared with other exoskeleton rehabilitation robots driven by pneumatic muscles, the exoskeleton rehabilitation robot in the present invention, which concentrates all pneumatic muscles in the pneumatic muscle framework, has a simple, compact structure, and is safe and easy to operate.
