The invention discloses a production method of an auxiliary material for clothing and footwear. The production method comprises the following steps: step I: treating the back surface of a TPU slice with xylene, treating the TPU slice with a treating agent after xylene dries out and volatilizes, and drying the TPU slice; step II: locating and spreading the treated TPU slice on a cutter mould, putting a PP film on the back surface of the TPU slice, putting two layers of silicon sheets, and carrying out cold press moulding to form a semi-finished product; step III: injecting liquid silicon into the semi-finished product, flatting silicon, spreading PA hot melt glue on the liquid silicon, covering the semi-finished product with high-temperature release paper, covering a close-grained thick cloth on the high-temperature release paper, carrying out vulcanization with oil pressure through an oil press, and after oil pressure, pressing with a cold machine till the semi-finished product fully cools and is moulded; step IV: after cooling, tearing redundant deckle edges on the cutter mould, pasting and demoulding the product with heat transfer paper to obtain the finished product. The production method can stably combine silicon sheets with TPU slices to achieve different effects, namely, light reflection, approximation, and the like, so that the product not only has good comfortable feeling but also has aesthetic feeling and safety.