Extruded Polystyrene (XPS) Foam Insulation Board is a kind of rigid extruded polystyrene thermal insulation material, based on polystyrene resin as main ingredient, by adding certain proportional additive, is a kind of high performance rigid foam with honeycomb closed pore structure which manufactured through special heating extrusion forming process under the condition of strict quality control on imported production line, the interconnection wall of honeycomb structure has consistent thickness, and there will be no gap completely, therefore, the uniform organization through extrusion process makes the products have excellent thermal insulation properties, good wet moisture resistance and high pressure performance. In addition, closed-cell structure filled with CO2 gas will not cause ozone layer broken, which is more environmental friendly compared with the conventional CFC gas and HCFC gas.