Overflow protection device and dish washing machine

The utility model discloses an overflow protection device and a dish-washing machine. The overflow protection device comprises a bottom cover plate; the floater bracket is arranged on the bottom cover plate; a water storage tank is arranged in the center of the bottom cover plate, and the floater support covers the water storage tank; the positioning block is arranged on the bottom cover plate; a slot is formed in the positioning block; the joint bar is arranged on the circumferential surface of the floater bracket; when the floater support rotates around the center, the inserting ribs can be inserted into and separated from the inserting grooves. The elastic limiting device is arranged on the bottom cover plate; the elastic limiting device is positioned on the upstream of the positioning block along the rotating direction when the joint bar is inserted into the slot; when the elastic limiting device is in a natural state, the elastic limiting device is located on a rotating path of the joint bar; when the el