The invention relates to domestic sewage treatment equipment and discloses aluminum alloy disc-shaped trapezoidal magneto thread kitchen sewage treatment equipment. The equipment comprises a kitchen washing pool, a three-stage barrier set, oil removal equipment, centrifugal equipment, a salt-tolerant anaerobic biofilm reactor, a salt-tolerant aerobic biofilm reactor and a thread energy recovery reverse osmosis system as improvements: an internal thread on a volute outlet boss is fixedly connected with an external thread on a switching high-pressure tube in a sealed manner so as to form a pressurization screwed joint; a thread energy recovery booster pump is composed of a pressure increase threaded pump part and a threaded pressure switch part; the pressure increase threaded pump part is driven by a disc-shaped trapezoidal magneto; a booster pump suction port and an overall fixed screw hole are respectively formed in the front end face of the threaded booster pump body; a through hole is formed in a pressurization flange plate and corresponds to the overall fixed screw hole; a fastening screw penetrates through the through hole in the pressurization flange plate and is matched with the overall fixed screw hole; and a pressurization center drain hole is aligned at the booster pump suction port. The equipment disclosed by the invention is of a threaded pipeline connecting structure and is simple in structure.