The invention discloses a sewage treatment device. The device comprises a sewage treatment pool body, a motor, a movable female joint, a movable pin end, a water pipe, a spray pipe, a probe T, conductive ring slices, an insulating ring slice, a carton brush, a rechargeable battery E, a wireless receiving module and an AC/DC convertor, wherein the movable female joint is fixed with a rotating shaftof the motor, the movable pin end is movably connected with the movable female joint, one end of the water pipe is connected with a tap water pipe through an electromagnetic valve, the other end of the water pipe is communicated with the movable pin end, the spray pipe is provided with multiple nozzles, and communicated with the movable female joint, the probe T is fixed below the spray pipe andcan scan to foam on the sewage surface, the conductive ring slices are fixed outside the rotating shaft, the insulating ring slice is embedded between the two conductive ring slices, the carton brushis fixed below a machine frame and can touch the conductive ring slices, the rechargeable battery E supplies power to a wireless transmission module and is connected with the two conductive ring slices, the wireless receiving module is electrically connected with the electromagnetic valve through a driving module, the AC/DC convertor is connected with the carton brush and interstitially charges the rechargeable battery E through the two conductive ring slices. The sewage treatment device has the advantages of being convenient to install, effectively removing foam, and reducing environmental pollution.