NOVELTY - Integrated nitrogen and phosphorus removing device of waste water comprises a middle mixed reaction tank, a three-phase separating tank and a filtration tank. The mixed reaction tank further comprises e.g. an upper suspended bio-film zone. A perforated wall is arranged between the dropped biofilm zone and the three-phase separating tank. The three-phase separating tank comprises an upper precipitating zone and a lower three-phase separating zone. The filtration tank comprises an upper water inlet zone, a middle water filtration zone and a lower water discharge zone.    USE - Used as an integrated nitrogen and phosphorus removing device of waste water.    ADVANTAGE - The integrated device: has strong impact resisting capacity; can remove nutrients by creating an aerobic/anoxic/anaerobic environment during the process; has strong adaptability, simple structure without occupying new area; meets the principle of technical improvement and has a great application prospect.    DETAILED DESCRIPTION - Integrated nitrogen and phosphorus removing device of waste water comprises a middle mixed reaction tank, a three-phase separating tank and a filtration tank. The three-phase separating tank is arranged on both sides of the mixed reaction tank and the filtration tank is arranged outside the three-phase separating tank. The mixed reaction tank further comprises an upper suspended biofilm zone and a lower dropped bio-film zone. A perforated wall is arranged between the dropped biofilm zone and the three-phase separating tank; the perforated wall of the dropped bio-film zone is provided at least with an agitator; the bottom of the dropped bio-film zone is provided with multiple aerators as well as equipped with a sludge discharge pipe connected outside. A waste water discharge pipe arranged above the dropped bio-film zone is connected with an outlet of a waste water pump and an inlet of the waste water pump is connected with an outer waste water zone by a wastewater inlet pipe. The three-phase separating tank comprises an upper precipitating zone and a lower three-phase separating zone. The middle part of the precipitating zone is provided with a reflecting plate inclined downwards and the bottom part of reflecting plate is inserted above the three-phase separating zone in an inclined manner. The upper part of the precipitating zone is equipped with a back washing water inlet pipe connected with the inlet of a back washing pump and the outlet of the back washing pump is connected with the middle part of a water discharge zone of the filtration tank by a back washing water discharge pipe. The filtration tank comprises an upper water inlet zone, a middle water filtration zone and a lower water discharge zone. The middle part of the water discharge zone is equipped with the back washing water discharge pipe connected with the back washing pump and an isolating wall between the filtration tank and the three-phase separating tank is lower than the mixed reaction tank.