By understanding the development level of anti-loosening technology of threaded connectors at all companies from home and abroad, we studied the problem of loosening of threaded fasteners caused by the harsh working environment and strong vibration during the use of coal mine machinery and equipment, resulting in mechanical equipment failures Even hazards such as casualties. Through analysis and research on the basic principles of fastener loosening, we tried to find out the root cause of fastener loosening, through practice accumulation and application, research and discuss several commonly used fastener loosening methods, and by comparing and analyzing the advantages and disadvantages of many different anti-loosening methods, a solution is provided for solving the loosening of threaded fasteners of coal mine machinery and equipment. This method is not only applicable to coal mine machinery and equipment, but also provides a reference for solving the loosening problem of threaded fasteners of non-coal machinery and equipment.