The invention discloses an anti-corrosion grease coating device, which comprises a machine frame, a workbench, an oil tank, a coating box, a bracket, a guide wheel, an oil feeding pipe, an oil return pipe, an oil pump, a coating roller, an oil inlet pipe and an oil outlet hole. The upper end of the frame is provided with a workbench, the workbench is provided with a coating box, the lower part of the workbench is provided with an oil tank, the two sides of the oil tank are symmetrically provided with supports, the top of the support is provided with guide wheels, and the wires pass through The guide wheel passes through the middle of the coating box, and the coating box is provided with two coating rollers arranged tangentially up and down, and the outer wall of the coating roller is uniformly provided with oil outlet holes, and the coating roller ends are There is an oil inlet pipe at the bottom, the oil inlet pipe is connected to the oil pipe, the lower end of the oil pipe is inserted into the bottom of the oil tank, the oil pump is arranged on the oil pipe, the oil return pipe is connected to the bottom of the coating tank, and the lower end of the oil return pipe is into the fuel tank. The invention has the advantages of simple structure, convenient use, good coating uniformity, high work efficiency, and the grease can be recycled and reused.