改革开放使千百万农村剩余劳动力从耕耘的土地上走出来，进城务工。在各行各业，尤其在一些脏、苦、累、险及特殊行业到处可见他们劳动的身影。但令人担忧的是，农民工伤亡事故时有发生。这些伤亡事故的产生不少是由于农民工安全意识淡薄或缺乏培训，在生产工作中违章操作... Since the reform and opening up, tens of millions of rural surplus labor force have been brought out from cultivated land and migrated to cities for work. Their work can be seen everywhere and in all walks of life, especially in dirty, bitter, tired, dangerous and special industries. However, what is worrisome is that casualties among migrant workers have occurred frequently. Many of these casualties have been caused by light or lack of training of migrant workers and illegal operation in production work.