Sewage treatment device

The invention belongs to the field of sewage treatment, particularly relates to structural improvement of a sewage treatment device, and particularly provides a sewage treatment device capable of enabling backwashing water sprayed by a high-pressure spray head to completely cover the side face of a filter vat. The sewage treatment device comprises a microfilter body, wherein the microfilter body comprises a box body, and the filter vat is rotatably arranged in the box body; a driving device used for driving the filter vat to rotate is arranged on the box body; a sliding rod is arranged above the filter vat; the sliding rod is parallel to the axis of the filter vat and is slidably connected with the box body, and the sliding direction of the sliding rod is parallel to the axis of the filter vat; a plurality of nozzle assemblies are arranged on the sliding rod side by side and used for spraying water to the side face of the filter vat; one end of the sliding rod is connected with the output end of the driving d