Sewage treatment device and sewage treatment method

The invention relates to the technical field of sewage treatment, and discloses a sewage treatment device and a sewage treatment method.The sewage treatment device comprises a shell, the shell is provided with the sewage treatment device, the sewage treatment device is provided with a water inlet pipeline and a water outlet pipeline, and the water inlet pipeline and the water outlet pipeline are each provided with a valve mechanism used for controlling opening and closing of the water inlet pipeline and the water outlet pipeline; the valve mechanism comprises two valve grooves, the two valve grooves are formed in the water inlet pipeline and the water outlet pipeline respectively, and valve plates are arranged in the two valve grooves in a sliding mode; a driving mechanism is arranged on the shell and used for driving the two valve mechanisms to operate, the driving mechanism comprises a motor arranged on the shell, a first lead screw is arranged on the motor, and a second lead screw is rotationally arranged