▎ 摘　　要

NOVELTY - Preparing a polyvinylidene fluoride composite foaming material, comprises: extruding and granulating polyvinylidene fluoride, polymethyl methacrylate, and carbon materials to obtain composite particles; and using injection foaming method to foam the composite particles into shaped products, and obtaining the polyvinylidene fluoride composite foaming material. USE - The method is useful for preparing polyvinylidene fluoride composite foaming material, which is useful in preparing piezoelectric device (claimed). ADVANTAGE - The polyvinylidene fluoride composite foaming material has excellent piezoelectric performance and mechanical performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a polyvinylidene fluoride composite foaming material.