Simple sewage treatment device

The invention relates to a simple sewage treatment device. The simple sewage treatment device comprises a water storage basin; the central position of the water storage basin is provided with a water outlet which is composed of an upper water outlet and a lower water outlet; the upper water outlet and the lower water outlet are both provided with a filter screen; a impurity-removing inclined plate is arranged below the lower water outlet; the water outlet is connected with a reservoir through a water pipe; the water pipe is provided with a water treater; at least a layer of an oil-filtering film is arranged in the water treater; and the outside wall of the oil-filtering film is arranged in the inside wall of the water treater. The simple sewage treatment device has a simple structure; as the water outlet is composed of the upper water outlet and the lower water outlet, if the lower water outlet is blocked, the upper water outlet is still in use, so the problem of blockage of the water outlet is effectively overcome; domestic water like vegetable washing water is poured into the water storage basin, large impurities in the domestic water are filtered out via the filter screens, then the domestic water enters the water treater; and treated water can be used for mopping a floor and flushing a toilet, so secondary utilization of sewage is realized and the water resource is saved.