A drain hose restriction device and a washing machine are provided, comprising: a base plate for detachably connecting with a body. The drain hose restriction device includes a rope fastening structure, comprising a first part having a mounting cavity and a second part, at least part of the second part being disposed inside the mounting cavity; an elastic member, disposed inside the mounting cavity, with one end against or connected to a wall of the cavity of the mounting cavity, and the other end being pressed against or connected to the second part, being always in a compressed state; a limiting rope, one end of which is threaded through the first part and the second part and is connected to the base plate,, the limiting rope positioned at one side of the first part back away from the base plate forms a limiting ring.