Flocculation pool (generally known as reaction pool), which plays an important role in water purification. The particle size of suspended matter and body matter in natural water is very small. To remove these substances usually by coagulation method, i.e. adding appropriate coagulant in raw water, after full mixing, the colloidal stability is bad (destabilization) and mixed phase adsorption and polymer coagulant in water after the particle has flocculation performance. The purpose of the flocculation tank is to create the appropriate hydraulic conditions so that the flocculation performance of the particles in the mutual contact aggregation, in order to form a larger flocculation (flocculation). Therefore, flocculation pool design is appropriatein relation to the effect of flocculation, sedimentation and flocculation effect has direct impact to follow-up treatment. Flocculation mixer is a mechanical agitation of the device, it is mainly used for wastewater treatment of the mixing process. The design of the flocculation tank design, the design of the mixer and its technological process.