The word "safety first" was first put forward by B. H. Carey, chairman of American steel company. 1906, Kaili learned lessons from long-term continuous accidents and made up his mind to get out of trouble; He skillfully changed the management policy put forward by the company, changing the original "quality first" and "output second" into "safety first" and "quality second". The output is the third. The change of this policy not only ensures the safety of employees, but also ensures the quality and output. Carey's slogan "Safety is the tenth" and his safety measures were successful, which shocked American industry. 19 12, Chicago established the National Security Association to study and formulate the draft security law. 19 17 safety association was also established in London, England. Since then, the slogan of "safety first" has been accepted by many enterprises and management departments.