Gate valve with antirust function

The utility model belongs to the technical field of gate valves, and particularly relates to a gate valve with an anti-rust function, which comprises a valve body, a water inlet is arranged at the right side end of the valve body, a water outlet is arranged at the left side end of the valve body, an opening and closing part is arranged between the water inlet and the water outlet in a contact manner, and a sliding plate is fixedly arranged on the upper side of the opening and closing part. Sliding grooves are formed in the valve body and located on the two sides of the sliding plate, a baffle is fixedly arranged on the inner wall of the valve body and located on the upper side of the sliding plate, a strong spring is fixedly arranged between the baffle and the sliding plate, and a valve rod is arranged in the middle of the valve body in a contact mode and penetrates through the plate wall of the baffle to be attached to the upper side wall of the sliding plate. A limiting plate is fixedly arranged on the rod