Side into the mixer is a stirring device is mounted on the side wall of the cylinder device, the agitator mixer on the generally axial flow type, with a multi-propeller agitator, under the same power consumption, the maximum stirring effect can be obtained power consumption is only the top of stir 1/3 to 2/3, the cost is only the top of stir 1/4 to 1/3. Speed ??can be 200 ~ 750r / min. Widely used in desulfurization, denitrification and a variety of large-scale stirred tank or tank removal. In particular, the use of one or more side-mixer in a large tank or storage tank to work together, in the case of low power consumption they can get a good mixing effect.