NOVELTY - Recovering nitrogen and phosphorus interception aquatic ecosystem in-situ involves using a combination of ecological floating bed biofilm technology for in situ interception of nitrogen and phosphorus pollution of water bodies, where the technology comprises: (1) a setting unit biofilm support structure; (2) fixed biofilm carrier; (3) biofilm carrier; (4) control pollution discharges or stormwater runoff pollution imported water body angle; and (5) ecological floating bed.    USE - The method is useful for recovering nitrogen and phosphorus interception aquatic ecosystem in-situ (claimed).    ADVANTAGE - The method is highly reliable and effectively restores nitrogen and phosphorus balance in an environment or system.    DETAILED DESCRIPTION - Recovering nitrogen and phosphorus interception aquatic ecosystem in-situ involves using a combination of ecological floating bed biofilm technology for in situ interception of nitrogen and phosphorus pollution of water bodies, where the technology comprises: (1) a setting unit biofilm support structure: the curtain surrounded by a carrier to form a semi enclosed biofilm carrier unit, the carrier unit is fixed biofilm carrier filler which is not closed to the side of the opening surface, the opening surface opposed to one side of the bottom surface, the other for the side, at the corner unit biofilm carrier set connected buckle on the outer corners of one side of the biofilm carrier unit installation flukes; (2) fixed biofilm carrier: the opening direction of the unit biofilm carrier direction oriented import sources, the cell biofilm carrier fixed to the body of water to be treated, the unit is fixed to the bottom end of the biofilm carrier body of water, the other end floating in the water, when the unit is fixed biofilm carrier will use the fork to the anchor rod claw unit biofilm carrier corners along the soft sediment 1 at the upper end of biofilm carrier elements from the surface 2, according to need treatment area and water depth of the water body chosen by combining some units connected in a biofilm carrier biofilm carrier, the unit uses a fixed biofilm carrier between the corners of the unit vectors connecting buckle connection; (3) biofilm carrier: in pollution discharges or stormwater runoff pollution zone dosing sewage treatment agents, the dosage of the sewage treatment agents for 5-100 g/m3, with the water into the sewage treatment biological agents membrane carrier, was intercepted biofilm carrier layers of the biofilm carrier in situ; (4) control pollution discharges or stormwater runoff pollution imported water body angle: change contaminated water discharge terminal pipeline angle or control rainwater bus slots / drainage angle, control pollution discharges or stormwater runoff pollution import angle body of water is 30-60 degrees ; and (5) ecological floating bed: setting ecological floating above the bed biofilm carrier, using the positioning rod fixed to the ecological floating bed near the shore, the cold ecological floating bed planted with vegetation, vegetation density of 20-35 plants/m2.