Stirring device for preparing compound fertilizer

The utility model discloses a stirring device for preparing a compound fertilizer, relates to the technical field of stirring for preparing the compound fertilizer, and aims to solve the problems that the conventional stirring device can only perform single-direction rotary stirring operation and the overall stirring effect needs to be improved. A plurality of inner conveying shells are arranged on the inner wall of the mixing tank body, conveying screw rods are rotatably mounted in the inner conveying shells, through holes are formed in the two ends of the side surfaces of the inner conveying shells correspondingly, and the through holes, located in the lower end of the interior of the mixing tank body, in the side surfaces of the inner conveying shells are feeding openings; a through hole located in the upper end of the interior of the mixing tank body is a discharging port, a stirring rod is rotationally connected to the position of a middle shaft of the mixing tank body, an alternating current motor is fi