Sewage treatment device

The utility model relates to a sewage treatment device. The sewage treatment device comprises a lifting pump, an aerobic tank and a jet aeration structure arranged in the aerobic tank, a biological filler is arranged in the aerobic tank, the jet aeration structure is arranged on the side of the biological filler, gas aerated by the jet aeration structure can be prevented from disturbing biofilm formation of the biological filler, the biofilm formation efficiency of the biological filler is high, a water inlet of the jet aeration structure is close to the highest liquid level of the aerobic tank, and a water outlet of the jet aeration structure is close to the bottom of the aerobic tank; an inlet of the lifting pump is communicated with the bottom of the aerobic tank, an outlet of the lifting pump is located above a water inlet of the jet aeration structure, and the lifting pump can lift sewage at the bottom of the aerobic tank to flow back to the water inlet of the jet aeration structure, so that first hydrau