Black water first enters the front-end septic tank for pre-treatment, where the scum and sediment are intercepted, and the supernatant enters the biochemical treatment section of the equipment. It relies on the microorganisms in the water and the moving bed filler after the membrane is hung for treatment, drolysis and acidification degrade organic matter, reduce COD, and perform ammonification. After biochemical treatment, the sewage flows into the psical treatment section of the backend. The selected functional filter materials have targeted adsorption of ammonia nitrogen, interception of suspended solids, killing of Escherichia coli, and supporting materials, which can ensure effective reduction of COD and ammonia nitrogen in the effluent. On the basis of meeting basic irrigation standards, higher requirements can be achieved. The backend can be equipped with an additional clean water tank to collect and treat the tail water, meeting the requirements for resource utilization in rural areas.