The invention discloses a coagulating and stirring device for polymeric phosphate aluminum potassium chloride. The coagulating and stirring device for polymeric phosphate aluminum potassium chloride comprises a frame, wherein a stirring box is welded to the inner wall of the top end of the frame; a first rotating motor is welded to the inner wall of the top end of the stirring box; an output end of the first rotating motor is connected with a first rotating shaft; a stirring plate is fixed at the end, which is away from the first rotating motor, of the first rotating shaft through a screw; twosides of the stirring plate are symmetrically connected with stirring sticks; first through holes are symmetrically formed in side walls of two sides of the stirring box; grooves are formed in the inner wall of the top end of each first through hole in the length direction of the first through hole; a second rotating motor is arranged in each groove; an output end of the second rotating motor isconnected with a second rotating shaft; and a baffle is fixed at the end, which is away from the second rotating motor, of the second rotating shaft through a screw. Heat generated in a polymeric phosphate aluminum potassium chloride stirring process can be dissipated, the polymeric phosphate aluminum potassium chloride can be stirred at the most suitable temperature in a stirring process, the service life of the device is prolonged, and the stirring efficiency is greatly improved.