Precipitation separation device and integrated diversified sewage treatment system with same

The invention discloses a precipitation separation device and an integrated diversified sewage treatment system with the same. A sewage treatment unit comprises a body, a containing cavity is formed in the body, and the body is provided with a water inlet and a water outlet which are communicated with the containing cavity separately; separation components are arranged in the containing cavity anddivide the containing cavity into an anaerobic tank communicated with the water inlet, a first aerobic tank, a second aerobic tank and a precipitation filtration tank communicated with the water outlet; the precipitation separation device is arranged in the precipitation filtration tank; the precipitation separation device comprises a grid assembly, a screen and light particles, the grid assemblyis connected with the body and the separation components, the screen is arranged on the outer surface of the grid assembly, the light particles are arranged in the precipitation filtration tank and located on the side, away f