Connecting structure of cleaning device and cleaning device

The utility model relates to a connecting structure of a cleaning device, which comprises a handheld operation part for a user to operate and a cleaning base part movably connected with the handheld operation part, the handheld operation part is connected with an adapter, the adapter is provided with a rotating shaft part, and a positioning groove and a movable groove are arranged on the circumferential surface of the outer side of the rotating shaft part; a shaft supporting seat is installed on the cleaning base part, a containing groove is formed in the shaft supporting seat, a movable positioning protruding block is arranged in the containing groove in a contained mode, and a spring piece is arranged between the positioning protruding block and the bottom of the containing groove. The rotating shaft part of the adapter is connected to the shaft supporting base, and the upper end of the positioning protruding block is inserted into the positioning groove or the movable groove in a matched mode. The cleaning