In　order　to　recycle　waste　foamed　plastic　materials,　the　waste　materials　were　firstly　melt,　then　cooled　and　crushed,　and　so　the　waste　foamed　plastics　aggregate　(called　EPS　aggregate)　are　obtained.　Because　the　heat　conductivity　of　EPS　aggregate　is　very　low　and　density　is　also　small,　the　EPS　aggregate　is　proposed　to　be　used　to　construct　anti-freezing　base　course　of　road　in　this　study　for　decreasing　the　frost　depth　and　freezing　heave.　The　CBR　test　and　freezing　test　of　mixture　was　performed　in　the　laboratory,　and　a　test　road　was　constructed　on　the　site.　Result　shows　that　EPS　aggregate　can　improve　the　bearing　capacity　(CBR)　of　the　roadbed　material,　especially　when　the　roadbed　material　is　weak　clay.　Meanwhile　the　frost　depth　of　roadbed　and　base　course　that　contains　the　EPS　aggregate　is　reduced　to　a　large　extent.　This　result　is　also　proved　by　the　site　test　of　pavement.　So　mixing　EPS　aggregate　can　reduce　the　frost　depth　of　road,　which　can　improve　the　stability　of　road　in　freezing　area.