Water-based paint mixing device

A water-based coating mixing device comprises a mixing box body and supporting legs fixed to the four corners of the lower surface of the mixing box body, a motor is fixed to the upper surface of themixing box body, feeding pipes communicating with the mixing box body are arranged on the left side and the right side of the motor, and an output shaft at the lower end of the motor penetrates through the upper surface of the mixing box body and is fixedly provided with a connecting shaft; a plurality of pairs of stirring blades are fixed to the circumferential face of the connecting shaft, a bearing is fixed to the bottom end of the connecting shaft, three connecting rods are fixed to the outer circumferential face of the bearing, an annular air pipe is fixed to the ends, away from the bearing, of the three connecting rods, an air pump is fixed to the rear surface of the mixing box, and the air outlet end of the air pump is connected with an air inlet pipe. The inner wall of the mixing box body can be cleaned th