Upper limb rehabilitation exercise robot

The utility model discloses an upper limb rehabilitation exercise robot which comprises a seat, an exercise pull rod, a pull rope, an adjusting abutting plate, a spring, a switch, a robot base, a pull block, a sliding groove and a fixing block, the top of the robot base is fixedly connected with the seat, and the top of the robot base is symmetrically and fixedly connected with two L-shaped side plates. The upper portions of the two L-shaped side plates are jointly and rotationally connected with a first pulley and a second pulley, a patient pulls an exercise pull rod to enable the upper limbs to move to conduct exercise, rehabilitation exercise of the upper limbs can be achieved, the telescopic end of a second electric cylinder extends to drive an adjusting abutting plate to move to compress a spring, and therefore the rehabilitation effect of the patient is improved. When the adjusting abutting plate compresses the spring downwards, the shorter the spring is, the larger the force needed by the patient when