The invention relates to a water pollution control method for landscape, which is characterized in that a bidirectional flow circulating system is established through an underwater diversion facility, the bidirectional flow circulating system comprises a planar aerobic flow circulating system, an elevation local anaerobic flow circulating system and an intersection area of two circulating systems. In an anaerobic segment of the elevation flow circulating system, phosphorus-accumulating bacteria is subjected to anaerobic phosphorus releasing, when the flow enters in the intersection area whichis circulated with the plane from the elevation circulating system, phosphorus-accumulating bacteria is in aerobic environment, the energy generated by PHB oxidation metabolism is used, phosphor which is largely exceeded the required amount is absorbed in forms of accumulating phosphorus to form phosphor-rich microbe sludge, then phosphor-rich microbe sludge is regularly discharged and treated through a sludge collecting tank of the intersection area, thereby the phosphor in the water of the landscape can be removed. According to the invention, the planar aerobic flow circulating system and an elevation local anaerobic flow circulating system are established to form proper environment for anaerobic phosphor releasing and aerobic excessive phosphorus absorption, the phosphate removal efficiency is high and the cost is low. The problems of landscape destroy, cost, drug resistance, secondary pollution and the like caused by the facility construction on the ground around the landscape water body and pharmaceutical chemicals addition.