Sewage treatment tank convenient to clean

The utility model discloses a sewage treatment tank convenient to clean, which belongs to the technical field of sewage treatment and comprises a tank shell, a top shell is fixedly mounted on the top surface of the tank shell, a driving motor and a water inlet pipe are fixedly mounted on the top surface of the top shell, and a water stirring component is arranged at one end of an output shaft of the driving motor. A filter screen is arranged on the inner wall of the box shell, water outlet pipes are fixedly mounted on the outer walls of the two sides of the box shell, and dredging assemblies are arranged in the water outlet pipes; according to the sewage treatment device, the water stirring assembly and the filter screen are arranged in the sewage treatment device, the filter screen can be synchronously cleaned when the sewage treatment device works through the design, so that the sewage treatment effect of the box body is continuously kept, and meanwhile, the dredging assembly is arranged in the sewage treat