Drain valve and shoe washing machine

The invention belongs to the field of cleaning equipment, particularly provides a drain valve and a shoe washing machine, and aims to solve the problem that a valve plug is not tightly closed due to impurities such as silt remained in a drain valve of an existing shoe washing machine. The drain valve comprises a first pipe section and a second pipe section, the second pipe section can communicate with the first pipe section, and the second pipe section is located on the downstream side of the first pipe section; the valve plug is freely contained in the second pipe section, and the communicating state of the first pipe section and the second pipe section is switched through sliding of the valve plug in the second pipe section; the portion, close to the first pipe section, of the second pipe section is provided with a containing part, so that solid matter from the first pipe section is collected in the containing part, and it is guaranteed that the first pipe section and the second pipe section can be reliably