The invention provides adjustable headband equipment. The headband equipment comprises a front supporting component; a first elastic component and a second elastic component, wherein the first elasticcomponent and the second elastic component are respectively connected with the two ends of the front supporting component; a rear connecting component, wherein the rear connecting component is respectively connected with the first elastic component and the second elastic component to form the annular connection of the front supporting component, the first elastic component, the second elastic component and the rear connecting component; a first rotating wheel group component arranged in the front supporting component; a first wire drawing component, wherein one end of the first wire drawing component is connected with the first rotating wheel group component, and the other end of the first wire drawing component is connected with the rear connecting component; and the first rotating wheelgroup component is used for contracting the rear connecting component by driving the wire drawing component. The technical scheme of the embodiment of the invention can ensure that the headband equipment is portable and can be stored, and meanwhile, the adjustability and the comfortable wearability are improved.