Abstract: Scraper conveyor for coal mine frequent hold motor shaft failure problem for the scraper conveyor improve the reliability of operation, in theory, expounded the scraper conveyor hold motor shaft fault mechanism, an analysis of the impact of electrical and mechanical scraper conveyor bearing failure hold motor shaft of the factors, with emphasis from the motor bearing selection, installation, lubrication, maintenance, temperature monitoring and the elimination of shaft currents, etc., made to prevent the scraper conveyor hold motor shaft failure of technical measures for the future operation of coal mine safety and maintenance of equipment provided theoretical basis.