The utility model discloses a biological ecology water treatment facilities, it includes wetland pond and circulating and filtering system, the wetland pond includes microorganism and the aquatic plant of top in the bed of packings body, the bed of packings body, the bed of packings body is equipped with separating net including the matrix layer of the biological contact layer of undercurrent and its top between biological contact layer of undercurrent and the matrix layer, circulating and filtering system includes loop filter pump, inlet tube, outlet pipe and electromagnetic control equipment. Adopt the device, filtration pump hocket in pond no. 1 and pond no. 2 is passed through to sewage treatment's anaerobism and good oxygen process, form the tidal flow, water is when the circulation system inner loop, dirty water particles is filtered on matrix layer 3, dirty water particles thing gathering, biomembrane adsorbed particle thing granulation thing lump, the lump is discharged after filtration system filters with the large granule that gathers formation such as phosphorus fungus, the pollutant that is decomposed into simultaneously soluble component is then got rid of through biomembrane and aquatic plant root system, has good nitrogen and phosphorus removal effect.