With the rapid development of leather industry, a large number of leather offcuts also caused serious waste of resources and environmental pollution. Especially in the textile, garment, footwear industry is more developed areas, industrial parks pile of leather, cloth offcuts everywhere, bringing serious environmental problems, social problems and government burden. The tannery industry produces a large amount of waste rubber raw materials every year. As a traditional industry with high input and low output, 30% of raw materials in the tanning industry end up as waste in its production process. According to statistics, India discharges about 150,000 tons of tanning waste every year, and the United States has 60,000 tons. And China is a big tanning country, throwing in nearly 200 million pieces of leather every year, which will produce 1.4 million tons of waste. Every year, there are a lot of leather, fabric, shoes, fabric offcuts are casually discarded, which not only causes serious environmental pollution,