The invention discloses a stirrer, which comprises a machine frame, wherein the machine frame is provided with a motor which is connected with a driving synchronous belt wheel through a driven synchronous belt wheel and a synchronous belt and has a main shaft which is connected with the shaft sleeve of the driven synchronous belt wheel, and the main shaft is also sleeved with integrally connectedupper and lower gears; the machine frame is also provided with a pneumatic clutch and a transmission gear meshed with the lower gear, the surface of the main shaft is provided with threads, a socket platform is sleeved on the threads, a revolution tank and a rotation tank are fixed on the left and right sides of the socket platform respectively, the lower part of the rotation tank is connected with a pinion through a connecting shaft, and the pinion is meshed with the upper gear; and the machine frame is provided with an air cylinder and the front end of the air cylinder is connected with a baffle plate. The stirrer is reasonable in structure and convenient in use and can uniformly stir materials, avoid generating air bubbles, eliminate air bubbles and be used in fields of electronics, chemical, light manufacturing, food, medicine, building materials, farm chemical and the like for mixing, dispersing and other processing of materials.