Washing machine capable of achieving washing and dewatering functions by converting single shaft into double speed

The utility model discloses a washing machine realizing washing and dewatering functions by converting a single shaft into double speed, which comprises a main body part and a rotating speed conversion part, the main body part comprises a base, the upper part of the base is fixedly connected with a water containing barrel, the upper part of the water containing barrel is provided with a cover plate, the upper part of the washing barrel is connected with a balance ring, and the upper part of the balance ring is provided with a rotating shaft. The washing machine is provided with a main body part and a rotating speed changing part, an input shaft extends into a water containing barrel during working, the shaft supports a washing barrel, when the washing machine enters a certain water level, upper floating teeth are synchronously arranged below an impeller, and the impeller is separated from the washing barrel by floating, so that the impeller can normally decelerate and rotate forwards and backwards, and meanwh