Small micro-power water purifying device

The utility model belongs to the technical field of sewage treatment, and particularly relates to a small micro-power water purifying device which comprises a box body, the box body is sequentially divided into an anaerobic anoxic zone, an aerobic zone and a settling zone which are communicated with one another by a first partition plate and a first inclined plate, and the anaerobic anoxic zone isa plurality of unpowered reaction chambers; the aerobic zone is communicated with the settling zone through a gap formed between the lower end of the first inclined plate and the bottom surface of the box body, the inclined direction of the first inclined plate is that the first inclined plate inclines downwards from the aerobic zone to the settling zone, and the settling zone is provided with asludge return mechanism; the invention aims to realize compact layout, small occupied area and low energy consumption of the whole equipment by virtue of unpowered arrangement of the anaerobic anoxiczone and backflow of sludge