Peristalsis bed and wastewater treatment method using same

The invention relates to a peristalsis bed and a wastewater treatment method using the same. The peristalsis bed is of a multistage series structure, and comprises a primary pretreatment unit, a secondary biological treatment unit and a tertiary deep treatment unit; the primary pretreatment unit is provided with a first sludge precipitation zone, a water inlet pipe and a first sludge discharge pipe; the secondary biological treatment unit is provided with a biological carrier, an aeration system, a second sludge precipitation zone and a second sludge discharge pipe; the tertiary deep treatment unit is provided with a third sludge precipitation zone, a dosing system, a drain pipe and a third sludge precipitation pipe. The sewage to be treated can be directly up to the A-level standard through detection after the sewage is treated for three times by the primary pretreatment unit, the secondary biological treatment unit and the tertiary deep treatment unit. According to the invention, different efficient microbial strains are used for compounding in accordance with the type of pollutants in the sewage, and the organisms with different functions are progressively fixed in a polymeric porous elastic carrier, so as to change the biological treatment process of wastewater from being disordered to ordered, and from mixed bacteria to specialized bacteria.