Liquid injection and air supplement pump

The invention discloses a liquid injection and air supplement pump, and relates to the technical field of wind turbine generator maintenance and overhaul, the liquid injection and air supplement pump comprises a box body, the box body comprises a placing groove, the placing groove is located in the box body, a baffle is fixedly arranged in the placing groove, a handle is arranged outside the box body, and an air supplement structure and a liquid injection structure are fixedly arranged in the placing groove; the air supply structure comprises a body, an inlet is formed in the side face of the body, and a sprayer is arranged on one side of the body. The liquid injection structure comprises a base, a vertical plate is arranged on the base, a middle plate is arranged in the middle of the vertical plate, and a top plate is arranged over the middle plate. According to the device, a screw rod can be driven to rotate through a driving motor, a push plate is connected to the surface of the screw rod in a threaded and