The utility model discloses an anti device that floats of hillside fields green ecological self -draining of building, including an anti device that floats of hillside fields green ecological self -draining of building drainage canal that bottom plate, the blind drainage ditch who is arranged in collecting groundwater, the underground water flow that is arranged in making blind drainage ditch go out, be used for filtering the filter equipment of drainage canal groundwater and be used for the drinking -water pipe with go into the building through filterable secret water pump, be equipped with the building on the bottom plate, under blind drainage ditch, drainage canal, filter equipment all located the bottom plate, drainage canal located blind drainage ditch's side, filter equipment and blind drainage ditch are connected constitution rivers passageway, and hug closely the building setting, the one end of drinking -water pipe stretches into filter equipment, and the other end stretches into the building, the beneficial effects of the utility model are that: through the stagnant water curtain and the barricade of building both sides, form prevention of seepage supporting construction,prevent that the secret water erosion and the slope body from collapsing.