The invention discloses a control method for a knob type encoder based on a washing/drying machine and relates to the technical field of laundry equipment. The control method for the knob type encoder based on the washing/drying machine is characterized in that the knob type encoder at least is used for selecting different washing/drying modes; when being selected, a certain working parameter can be adjusted by the knob type encoder within a specific range. According to the control method disclosed by the invention, the knob type encoder has a two-stage adjustment function, can operate and control multiple functions and is convenient and fast in operation.