Construction waste refers to the muck, waste concrete, waste masonry and other wastes produced by people in the production activities of the construction industry such as demolition, construction, decoration and repair. According to the source of production, construction waste can be divided into construction waste, decoration waste, demolition waste, engineering mud, etc.; according to composition classification, construction waste can be divided into residue, concrete blocks, crushed stones, brick fragments, waste Mortar, mud, asphalt block, waste plastic, waste metal, waste bamboo and wood, etc.