Anti-overflow device for sewage treatment

The utility model discloses an anti-overflow device for sewage treatment, which comprises a sewage well buried underground, a water pump and a water storage barrel are arranged on the ground on one side of the sewage well, the water suction end of the water pump is communicated with the sewage well through a water suction pipe, and the bottom of the water storage barrel is communicated with the sewage well through a water return pipe. The water outlet end of the water pump communicates with the water storage barrel through a drainage pipe, a controller and an alarm are further arranged on one side of the water storage barrel, a vertical first guide rod is fixed to the bottom of the sewage well, a floating disc capable of freely sliding up and down sleeves the first guide rod, and a second guide rod close to the first guide rod is fixed to the inner wall of the sewage well; a button switch located over the ejector rod is arranged on the second guide rod. According to the anti-overflow device for sewage treatme