XPS polystyrene extrusion foaming panel shows much more superiority to others in warm preservation, waterproof, compression strenght. So it is widely applied in many kinds of new constructions and rebuilding of civil engineerings.　　XPS panel is a kind of extrusion polystyrene thermal materials with high hardness, which is made from polystyrene resin and other auxiliary agents, coupled with injection of foaming agent. Through the extrusion process we can produce panel materials with continuously even surface layer and honey-comb structure. There is no gap on the interconnected walls, which have a consistent thickness. So this product with an even tissue will ensure its thermal function, good anti-moisture ability and high anti-compression property, realizing production of different densities and different compression strengths. It is mostly applied in such places as wall, groundwork, and house roof, which has compression strength over 250kpa, or in refrigeration house, road surface, railway, airport, square etc. And it is reputed as an optimal warm-preservation materials.