Abstract: A hot melt adhesive bonding fiber of the invention, which comprises at least one layer of thermal activation fiber cloth, which is interposed between a first layer of material and a second layer of material. The fiber cloth has a three-dimensional shape constituted by alternate protrusions and concaves, which is bonded with the first or second layer of material by hot-pressing, perfusion, or molding injection. The composite of the invention can be used for bonding all kinds of polyurethane materials with rubber (plastic) to strengthen the bonding intension.