Sewage purification bionic packed bed device

The invention provides a sewage purification bionic packed bed device. The sewage purification bionic packed bed device comprises a water inlet pipe, a water distribution channel, a packed bed, a water collecting tank and a water outlet pipe, wherein the water distribution channel and the water collecting tank are located at the two ends of the packed bed; the water inlet pipe is connected to the water distribution channel; the water outlet pipe is connected to the water collecting tank; the packed bed is composed of a spherical bionic packed bed, a suspension type high-density bionic packed bed, a hanging type bionic packed bed and a suspension type medium-density bionic packed bed which are connected in sequence and have the gradually reduced packing densities, so that impurities such as organic pollutants, nitrogen and phosphorus in the sewage are removed efficiently when the sewage sequentially passes through bionic packed beds with different processing functions, and sewage purification is further realized; the bionic packed bed device has the characteristics of being simple in structure, strong in practicability, easy to construct, good in treatment effect and the like.