The utility model relates to the technical field of dishwashers, in particular to a sprayer mounting structure and a dishwasher. The sprayer installation structure comprises an installation ring arranged on the inner container and a sprayer base arranged on the sprayer. The sprayer base comprises a water inlet ring and a connecting arm which is arranged on the outer side of the water inlet ring and can elastically deform, the fixed end of the connecting arm is fixedly connected with the sprayer, the water inlet ring is communicated with the water outlet of the inner container, and the connecting arm can be inserted into the mounting ring and rotate around the axis of the connecting arm in the mounting ring. According to the utility model, the connecting arm is directly inserted into the mounting ring and can rotate around the axial direction of the connecting arm in the mounting ring, so that the fixed height of the sprayer is effectively reduced, and the mounting space of the sprayeris saved. Due to the fact that the connecting arm is connected with the mounting ring in an inserted mode, the connecting arm is inserted into the mounting ring and shielded by the mounting ring, theconnecting structure of the sprayer and the inner container cannot be exposed, and connection of the sprayer and the inner container is more attractive.