The crushing machine series of mine scraper conveyer is mainly used in combination with the transferring machine and complete the conveying task of underground comprehensive mechanized coal mining with belt conveyer, scraper conveyer, shearer and hydraulic support. The models of mine crusher are PCM, PEM, PLM, etc. They are respectively represented as hammer crusher, jaw crusher, wheel crusher, etc. According to different working face and production capacity of mine, different crushing capacity of crusher is required. For example, PLM3000 wheel crusher has crushing capacity of 3000T /h. PLM4000 wheel crusher with crushing capacity up to 4000T /h. The crushing shaft group is the main component of the crushing coal and gangue. Using the broken shaft set higher rotational inertia stored at rated speed kinetic energy by installing group on the shaft of the broken blade and the broken material short contact time and impact break coal formation, again by cutter tooth and scraper chain, crusher, the speed difference between further to crush was broken coal, so as to achieve the goal of broken coal. Shuangzhi Coal machine focuses on the production and manufacturing of spare parts of scraper machine, transferring machine spare parts and crusher spare parts for mine. It is located in Zhengzhou with developed logistics. At present, it cooperates with major mining areas all over the country.