According to the design of spring and autumn chairs, cushions are usually equipped with fixing straps or straps to fix the cushions on the back of the chair. When installing, first put the cushion on the back of the chair, and then pass through the back of the chair or tie it to the back of the chair according to the design of the fixing belt or strap to ensure that the cushion is firmly fixed on the chair. This can ensure that the back pad will not slide or loosen, and provide comfortable support and sitting posture.