The utility model provides an administer black and odorous water body's ecological purifier, including battery reaction unit, purifier and the play liquid device that from top to bottom sets gradually, battery reaction unit is including outside cathodic reaction sleeve pipe and locate the intraductal anodic reaction sleeve pipe of cathodic reaction cover, and the space between cathodic reaction sleeve pipe and the anodic reaction sleeve pipe forms the cathodic reaction room, and anodic reaction overlaps intraductal space and is the anodic reaction room, is equipped with purifier 2 on the anodic reaction sleeve pipe and is separated by to realize the proton conduction of anodic reaction room and cathodic reaction room, the utility model relates to a microbiological fuel cell and the filtration technology that found combine together, can handle the black foul water in city, and it is good to go out water quality of water, realizes quality of water purification performance, increase the green plants, found ecosystem, both strengthened quality of water purification efficiency, can build the view again, beautify the environment, alga and green plants that the device was chooseed for use, can regard as biomass energy's raw materials future.