The invention discloses a high-efficiency clarifying pool for purifying water, relating to the technical field of supply water treatment. The high-efficiency clarifying pool comprises a reaction area and a clarifying area, wherein the reaction area consists of a mixed reaction area and a pushing flow reaction area, the mixed reaction area consists of a water inlet pipe, the clarifying area consists of an inlet, an inclined tube settling area and a concentration area, the pushing flow reaction area is communicated with the inlet, the inclined tube settling area is placed at the upper end of the clarifying area, the concentration area is placed at the lower end of the clarifying area, a mud hopper is arranged in the concentration area, the high-efficiency clarifying pool further comprises a sludge circulation system and a sewerage system, the sludge circulation system consists of a sludge circulation pipeline and a sludge circulation pump, one end of the sludge circulation pipeline is communicated with a mud hopper, the other end of the sludge circulation pipeline is communicated with a mud inlet pipe, a first switching valve is arranged on the sludge circulation pipeline, the sewerage system consists of a sewage pipeline and a sewerage pump, the sewage pipeline is communicated with the mud hopper, and a second switching valve is arranged on the sewage pipeline; and a sampling third switching valve is arranged on a water outlet.