Jaw crusher is an earlier crushing equipment, which is widely used in mining, metallurgy, building industry, chemical industry and other industries, and is used to crush coarse and medium crushing of various ores and rocks with compressive strength less than 300MPa. As a common mechanical equipment in production lines, the crushing granularity of jaw crusher can be adjusted differently according to the actual requirements of operation. This type of crushing equipment has a large crushing ratio, strong adaptability to the operation requirements of different minerals, and is not easy to block the crushing of materials with high moisture content. The jaw crusher is characterized by no sieve bars, and the crushing operation is performed by an elastic adjusting device. The equipment has the advantages of simple structure, reliable operation, convenient maintenance and low production and maintenance costs..