Disclosed is a self-locking lifting side shaft prismatic drum hand-pressing rotating mop jet-flow cleaning spin-dryer. A rotating basket, a rotating basket bracket and a rotating basket lifting shaft set are arranged in a cleaning drum. The spin-dryer is characterized in that the upper end of an upper rotating shaft cavity is provided with a self-locking slide block rotating groove and a self-locking slide block; the upper and lower ends of the inner side of a tube body of the self-locking slide block are provided with an upper gear ring and a lower gear ring respectively; the upper gear ring is provided with a braking gear, a slide groove guide gear and a braking gear rack slide groove, by lifting up and pressing the rotating basket, the self-locking slide block rotates to make the braking gear rack on a rotating shaft switch between the braking gear and the slide groove guide gear, and the lifting control of the rotating basket is achieved; the cleaning drum is prismatic, and the rotating basket bracket is movably connected with the corners of the cleaning drum. According to the mop spin-dryer, the whole process of cleaning and spin-drying the mop can be completed in one drum through lifting and pressing with the hands; the rotating basket is provided with jet-flow wings, and the dirt removal capability is higher..