The invention discloses a control method of an air guide plate, an air conditioner, a control device and a storage medium. The control method of the air guide plate comprises the following steps: a touch trajectory of users formed on a touch screen is obtained; a swing travel of the air guide plate is obtained according to the touch trajectory; and the air guide plate is controlled to swing according to the swing travel. Through association of the touch trajectory and the swing travel of the air guide plate, customized sweeping of the air guide plate is realized.