The　modified　starch　was　prepared　through　the　soluble　starch　wet　graft　vinyl　acetate　and　the　environmental　friendly　EVA　sole　foaming　materials　were　obtained　with　the　modified　starch.　The　effect　and　structure　of　the　modified　starch　was　analyzed　by　FT-IR,　grafting　ratio　and　grafting　efficiency,　while　the　mechanical　properties　and　microscopic　morphology　of　the　modified　starch/EVA　sole　foaming　materials　were　also　investigated.　According　to　the　results,　the　FT-IR　spectrum　of　the　modified　starch　showed　a　adsorption　peak　at　1746　cm-1,　which　was　assigned　to　the　stretching　vibration　of　the　carbonyl　group　and　indicated　that　the　monomer　of　vinyl　acetate　might　graft　onto　the　bone　of　the　starch.　The　best　initiator　concentration　was　7　mmol/L　and　the　optimum　reaction　temperature　was　70°C.　The　SEM　pictures　demonstrated　that　the　modified　starch　and　EVA　had　good　compatibility.　The　proportion　of　wet　grafted　starch/EVA　sole　foaming　materials　were　lower　than　traditional　EVA　sole　foaming　materials,　when　the　content　of　the　grafted　starch　was　40　phr,　the　proportion　of　the　composite　foaming　materials　reached　the　minimum,　which　was　0.085　g/cm3.