Intermittent potential energy biological sewage purifier

The invention belongs to the technical field of sewage treatment, and particularly relates to an intermittent potential energy biological sewage purifier which comprises an upper water tank componentand a plurality of standard layer components, the standard layer components are sequentially arranged from top to bottom and are in lap joint with one another, and a water outlet pipe is arranged at the position, close to the lap joint position, of the lowermost standard layer component. According to the intermittent potential energy biological sewage purifier disclosed by the invention, sewage flows into the plurality of layers of standard layer components by utilizing the upper water tank component, and when the sewage passes through each layer of standard layer component, intermittent biochemical treatment is carried out in the biological filler box in the standard layer component, so that the content of each index in the sewage is greatly reduced. The intermittent potential energy biological sewage purifier ha