Adding　nano-silica　particles　which　were　surface　modified　with　silane　coupling　agent　KH-570　into　ilignin-phenol-starch　resin,　KH570-g-SiO2/lignin-phenol-starch　composite　resin　(LPSR)　composite　materials　were　prepared.　The　silicon　dioxide　in　KH570-g-SiO2/LPSR　can　be　detected　by　FT-IR.　The　result　shows　that　KH570-g-SiO2/LPSR　have　excellent　performances　when　the　content　of　nano-silica　is　6%.　The　softening　point　is　100.9℃,　and　the　gel　time　is　78　s.　Compared　with　LPSR　resin,　the　tensile　strength　is　increased　by　13.0%　in　cold　state　(room　temperature)　and　3.7%　in　hot　state　(260℃),　the　bending　strength　is　increased　by　5.5%　in　cold　state　and　8.1%　in　hot　state.　The　improvement　of　heat　resistance　and　thermal　stability　of　composite　materials　which　is　caused　by　nano-silica　can　be　demonstrated　by　TGA.　©　2016,　Chengdu　University　of　Science　and　Technology.　All　right　reserved.