Self-purification sewage treatment equipment

The invention discloses self-purification sewage treatment equipment, and relates to the technical field of sewage treatment equipment, the self-purification sewage treatment equipment comprises a treatment box, the side wall of the treatment box is communicated with a water inlet pipe, the inner wall of the treatment box is provided with a separation plate, the separation plate is internally provided with a filter screen, the vertical section of the filter screen is semicircular, and the vertical section of the filter screen is provided with a water inlet pipe; the self-purification sewage treatment equipment further comprises self-purification structures arranged in the treatment boxes respectively, the self-purification structures are used for cleaning foreign matters attached to the surfaces of the filter screens and discharging the foreign matters from the treatment boxes, and each self-purification structure comprises two sewage outlets formed in the side walls of the treatment boxes. The surface of the