Wood-plastic composites (wpc) is a new kind of composite material which has been booming in recent years. It refers to the use of polyethylene, polypropylene and polyvinyl chloride instead of the usual resin adhesive, above the wood flour, rice husk, straw and other waste plant fiber mixed into a new wood material, and then by extrusion, molding, injection molding and other plastic processing technology to produce the plate or profile. Mainly used for building materials, furniture, logistics and packaging industries. The plate, with a certain percentage of plastic and wood powder, by hot extrusion molding, called the extruded wood-plastic composite sheet.