The invention relates to a disinfection device, and especially relates to an inner barrel disinfection device for a washing machine. The invention provides an inner barrel disinfection device for a washing machine, which is time-saving and labor-saving and low in labor strength, disinfection is comprehensive, fungal infection can be prevented, and furthermore various skin diseases can be prevented. Accordingly, the invention provides the inner barrel disinfection device for the washing machine, and the inner barrel disinfection device comprises a base plate, a disposing plate, a vertical plate, a cylinder, arc-shaped clamping plates, supporting plates, a top plate, a hollow sleeve, a first spring, a slide bar, an arc-shaped brush, and a first disinfection apparatus; and the middle of the top of the base plate is provided with a rotating apparatus, a rotating part of the rotating apparatus is connected with the disposing plate, and the vertical plate is installed at the middle of the top of the disposing plate in a bolt connection manner. The effects that time and labor are saved, labor strength is low, disinfection is comprehensive, fungal infection can be prevented, and furthermore various skin diseases can be prevented are achieved.