The invention provides a lower limb powered shape righting device which comprises a waist supporting assembly and a left leg powered mechanism and a right leg powered mechanism which are the same in structure, the left leg powered mechanism and the right leg powered mechanism are symmetrically mounted on the two sides of the waist supporting assembly, and the waist supporting assembly is provided with a power module and a controller; the left leg powered mechanism is composed of a foot assembly, a shank assembly and a thigh assembly, the foot assembly is hinged to the shank assembly, the shank assembly is hinged to the thigh assembly, and the thigh assembly is hinged to the waist supporting assembly; the shape righting device further comprises an electric push rod, and the electric push rod is electrically connected with the controller; one end of the electric push rod is hinged to the shank assembly, and the other end of the electric push rod is hinged to the thigh assembly to drive the thigh assembly and the shank assembly to move relative to each other. The lower limb powered shape righting device has the advantages that the structure is stable, controllable performance is good, the lower limb powered shape righting device is portable, and a patient who is unhealthy in the lower limbs or a patient who suffers from knee, ankle and foot diseases can be assisted in conducting daily rehabilitation training independently.