The invention discloses a knob and a washing machine with the same, belongs to the field of washing machines and accessories thereof, and aims to solve the problem that a control panel of an existing structure cannot be reduced effectively. The knob comprises a hollow shell, wherein a display screen is arranged in the shell; a display window is formed in the shell and corresponds to the display screen; an annular display strip is detachably arranged on a side wall of the shell; and the knob can transmit selected information on the display strip to a control device, receive information to be displayed on the control device and display the information on the display screen. The washing machine comprises a control panel mounted on the shell, and the knob is arranged on the control panel. The area of the control panel is saved by the knob on the premise of not affecting use, and therefore, the size of the whole washing machine is reduced. Contents such as washing programs and to-be-selected parameters can be selected by rotation of the knob of the washing machine, and the area of the control panel and the size of the whole washing machine is reduced preferably.