Sealing structure and cleaning sterilizer

The utility model belongs to the technical field of medical cleaning and disinfection, and discloses a sealing structure and a cleaning and disinfecting device. The sealing structure is used for sealing a cleaning tank and a cover body covering the cleaning tank, and comprises a first surrounding edge, a second surrounding edge, a third surrounding edge and a fourth surrounding edge, the sealing ring comprises a caulking groove and a water retaining skirt edge; the caulking groove is formed in the circumferential direction of the sealing ring and can be embedded into the first surrounding edge so that the sealing ring can be installed in the cleaning groove. The water retaining skirt edge is arranged on the bottom edge of the inner side surface of the sealing ring and extends towards the inner side of the sealing ring; the second surrounding edge is arranged on the end face, facing the cleaning tank, of the cover body in a surrounding mode, when the cover body covers the cleaning tank, the outer side face of