Mining system is an important functional part of mining equipment. Its stability and sustainability play a decisive role in the uninterrupted work of the majority of owners. The mining system is in direct contact with the working face at the same time. When the equipment is working, it is greatly affected by the structure and composition of the working face. The instantaneous change of the load caused by the rock or the ore with uneven hardness can easily bring mechanical damage or even stop the cutting head. The torque-limiting device installed in the mining system, the cutting part can not only through our reliable and efficient of the sliding friction and impact load can be converted to consume, so as to protect against impact load of the cutting part damage, also greatly ensure the uninterrupted operation of the equipment and prolong the service life of equipment, and reduce equipment maintenance costs for the owners.