The invention relates to a production method of an automotive interior trim part. The invention particularly relates to a method for producing an automotive front wall sound-insulation pad by using asteam die. The method comprises the following steps of a, taking hard-layer felt, soft-layer felt and a PE (Polyethylene) film as raw materials for the automotive front wall sound-insulation pad; b, starting a molding die; c, carrying out preheating treatment on an upper die and a lower die of the molding die; d, putting the raw materials for the automotive front wall sound-insulation pad into a cavity of the lower die of the molding die, and carrying out die closure on the upper die and the lower die of the molding die; e, carrying out compression molding after the die closure; f, carrying out pressure maintenance after the compression molding is finished; g, afterwards, stopping introducing high-temperature steam for 18 to 22 seconds; h, enabling a 0.8Mpa to 1.0Mpa of high-pressure dry gas to access a high-temperature steam inlet and opening the high-temperature steam outlet. By using the method, the production time is shortened; the production efficiency is improved and the rate-of-finished-products of a product is improved.