Abstract: An environment-friendly type polypropylene foam plastic and preparation method thereof. The foam plastic utilizes plastic elastomer as basis material, and a third monomer is led in as crosslinking co-agent to carry out crosslinking and control degradation products. Foam plastic profile products are made by graft copolymerizing said monomer on polypropylene and crosslinking, and then internal mixing, open mixing, sheeting and foam molding with compatibilizer, filler, nucleating agent, crosslinking agent and foaming agent.