Eutrophicated water body dephosphorization device

The utility model relates to a dephosphorization device for a eutrophic water body. The water dephosphorization device comprises a water dephosphorization device body and a water pump, the water dephosphorization device body is arranged on a floating platform and comprises a mixing tank with a stirring mechanism, a set of sedimentation tanks are arranged around the mixing tank, and the upper portion of the mixing tank is provided with a main water inlet pipe, a precipitator adding pipe and a first overflow pipe; a water inlet pipe and a second overflow pipe are respectively arranged at the upper part of each precipitation tank, the water inlet pipe of the next-stage precipitation tank is connected with the second overflow pipe of the previous-stage precipitation tank, the water inlet pipe of the first-stage precipitation tank is connected with the first overflow pipe of the mixing tank, and the second overflow pipe of the last-stage precipitation tank is a main drainage pipe; sediment buckets communicated wit