Energy-saving sewage treatment device

The utility model discloses an energy-saving sewage treatment device, which relates to the technical field of sewage treatment and comprises a foundation and an aerobic tank, an energy-saving component is arranged on the side surface of the aerobic tank and comprises a water pump, the water inlet end of the water pump is connected with a water inlet valve, and the water outlet end of the water pump is connected with a water outlet valve. And the water inlet valve and the water outlet valve are connected with siphons. Through the arrangement of the energy-saving assembly, sewage in the aerobic tank is pumped into the siphon after the water pump, the water inlet valve and one water outlet valve are opened, when the sewage passes through the top point of the siphon, the water pump, the water inlet valve and one water outlet valve are closed, and the other water outlet valve is opened; due to the fact that the height difference exists at the top of the siphon, water flows downwards and penetrates through the siph