The invention provides an intelligent medical robot for lower limb rehabilitation therapy. A movement suspension system is mounted above a movement transmission system through a stand column; weight reduction and position holding of a patient subjected to lower limb rehabilitation therapy are implemented by the suspension system; the patient uprightly walks on the movement transmission system under the driving effect of a lower limb exoskeleton robot system; the lower limb exoskeleton robot system is connected with a rotating system by a gravity center self-balancing system; the height of the lower limb exoskeleton robot system is adjusted according to change of center of gravity of the patient during walking of the patient; and a sensor system acquires equipment parameters and human body parameters, and transmits the equipment parameters and the human body parameters to an embedded control system to be displayed. The intelligent medical robot for lower limb rehabilitation therapy is high in control precision and high in intelligence, and can be used for rehabilitation training of upright walking of the patient.