A washing machine having a draining structure, wherein the washing machine comprises an inner drum installed in a housing of the washing machine, the inner drum is a tapered drum having a smaller diameter at one end and a larger diameter at the other end, and a draining flow passage is arranged at the end with larger diameter of the inner drum, a first end of the draining flow passage is communicated with the inner drum, and a second end of the draining flow passage penetrates the inner drum and is communicated with a drain pipe of the washing machine, the inner drum is the tapered drum that gradually increases in diameter from an opening of the inner drum to a bottom of the inner drum, and a center of the bottom of the inner drum is installed on an inner drum support via a rotating shaft, the first end of the draining flow passage is arranged at an intersection of the bottom of the inner drum and a side wall of the inner drum, the second end of the draining flow passage penetrates the center of the bottom of the inner drum and passes through a motor shaft along an axis of the inner drum, the second end of the draining flow passage penetrating the bottom of the inner drum is communicated with the drain pipe of the washing machine; characterized in that, the draining flow passage is arranged on an inner side surface of the bottom of the inner drum, a plurality of the draining flow passages are provided on the bottom of the inner drum, the first ends of the draining flow passages are uniformly distributed on an outer periphery of the bottom of the inner drum at an equal interval angle and are communicated with an inside of the inner drum, and the second ends of the draining flow passages are communicated and met at the center of the bottom of the inner drum and penetrate the center of the bottom of the inner drum to communicate with the drain pipe of the washing machine; each of the draining flow passages is formed of a hollow convex rib protruding from the inner side surface of the bottom of the inner drum, and the hollow convex rib lifts and beats clothes in the inner drum to wash the clothes during a rotation of the inner drum. the washing machine comprises an inner drum installed in a housing of the washing machine, the inner drum is a tapered drum having a smaller diameter at one end and a larger diameter at the other end, and a draining flow passage is arranged at the end with larger diameter of the inner drum, a first end of the draining flow passage is communicated with the inner drum, and a second end of the draining flow passage penetrates the inner drum and is communicated with a drain pipe of the washing machine, the inner drum is the tapered drum that gradually increases in diameter from an opening of the inner drum to a bottom of the inner drum, and a center of the bottom of the inner drum is installed on an inner drum support via a rotating shaft, the first end of the draining flow passage is arranged at an intersection of the bottom of the inner drum and a side wall of the inner drum, the second end of the draining flow passage penetrates the center of the bottom of the inner drum and passes through a motor shaft along an axis of the inner drum, the second end of the draining flow passage penetrating the bottom of the inner drum is communicated with the drain pipe of the washing machine; characterized in that, the draining flow passage is arranged on an inner side surface of the bottom of the inner drum, a plurality of the draining flow passages are provided on the bottom of the inner drum, the first ends of the draining flow passages are uniformly distributed on an outer periphery of the bottom of the inner drum at an equal interval angle and are communicated with an inside of the inner drum, and the second ends of the draining flow passages are communicated and met at the center of the bottom of the inner drum and penetrate the center of the bottom of the inner drum to communicate with the drain pipe of the washing machine; each of the draining flow passages is formed of a hollow convex rib protruding from the inner side surface of the bottom of the inner drum, and the hollow convex rib lifts and beats clothes in the inner drum to wash the clothes during a rotation of the inner drum.