Abstract: The method includes the steps of i) molding an inner tube from butyl rubber, ii) processing the outer wall of the inner tube into a coarse surface; iii) preparing cover panels from ethylene vinyl acetate (EVA) through a foaming process and then processing the inside wall of each cover panel into a coarse surface; iv) covering the cover panels over the inner tube by a press to form a blank ball; and v) embossing the surface of the blank ball thus obtained by an embossing machine through a heating process and then quickly cooling the embossed ball.