Polystyrene board-EPS, is a kind of polystyrene foam plastic board with closed-cell structure, which is made by heating and molding the expandable polystyrene beads after pre-foaming in the mold. EPS is also known as foam board, benzene board, etc. It is a kind of material with the advantages of light weight, low cost, low thermal conductivity, small water absorption, good electrical insulation, sound insulation, shock resistance, moisture resistance, simple molding process and so on.