This technology adopts the TPO foaming microsphere method, which is easy to obtain materials, low cost, simple process, and low equipment investment. It overcomes the shortcomings of traditional chemical foaming and supercritical physical foaming processes such as complex processes, large equipment investment, and difficult control. Using an internal mixer to prepare foaming masterbatch, a twin-screw extruder for modified graft foaming, and a series of mold hot pressing molding processes, the resulting product has a density of 0.05-0.9, excellent performance, environmental friendliness, and the advantages of not damaging the atmosphere. , the products produced are light in quality, with specific gravity ranging from 0.5-0.9g/cm3. The products have the advantages of flexibility, good hand feeling, and excellent rebound.