The utility model belongs to the mechanical equipment field, in particular to a wheel grounding structure of a bridge lifting device. The wheel grounding structure of the bridge lifting device comprises a car body, wheels and rails, wherein the wheels are fixed on the car body, and are in contact with the rails; the wheel grounding structure further comprises an electric brush bracket and electric brushes; the electric brush bracket is fixed on the car body through bolts; the electric brushes and the electric brush bracket are fixedly connected and positioned above the wheels; the electric brushes are contacted with the outer edges of the wheels; as the electric brushes are added and positioned above the wheels, the lifting device can realize three phases and four wires; as the electric brushes are connected with the outer edges of the wheels, the electricity conduction can be carried out through bypassing bearings in the wheels, and the grounding reliability and effectiveness are guaranteed when cars operate; and as the existing three-wire power supply equipment is modified, the funds are largely saved for enterprises, and the enterprise costs are reduced.