The utility model discloses a triple circular-flow coagulant sedimentation water treatment apparatus, which belongs to an environmental protection apparatus. The utility model is composed of a casing, the inner pipe of a reaction pond, the outer pipe of the reaction pong, a mud water return pipe, a separated pipe, a flow division board, a partition board, a sewage inlet pipe, an air inlet pipe, a sludge discharging pipe, an emptying valve, a clear water outlet pipe, an inclined pipe for setting and separating, a medicine adding pipe, etc. The utility model has the important points that the utility model is provided with a triple circular-flow acceleration reaction unit, the mud and water separation unit and a filtration unit, wherein, the mud and water separation unit is composed of a mud water flow division board and the stuffing of the inclined pipe; the filtration unit is composed of quartz sand or quartz pipes. The utility model achieves the integration of strengthening reaction, sludge return, mud water separation, filtration and purification. The utility model has the advantages of high efficiency, small energy consumption and small size.