随着现代工业、重工业的发展，起重设备在钢结构车间、冶金铸造厂以及铁路系统检修车间、电厂得到了广泛应用，不同的行业选用不同的起重设备，而起重机的工作级别是选用起重机不可缺少的一项，那么如何选择起重机的工作级别呢？ With the development of modern industry, heavy industry, lifting equipment in the steel structure workshop, metallurgy foundry and railway system maintenance workshop, power plants has been widely applied to different industries choose different lifting equipment, and choose crane crane work level is one of the indispensable items, so how to choose the work level of crane? 专业来说，划分工作级别的目的是为设计、制造以及用户的选用提供合理的统一的技术基础和参考标准，以取得较好的经济、安全效果，是起重机的工作状态得到较好准确的反映。不仅如此，对起重机划分工作级别还可以提高起重机零部件的通用化水平，实现不同起重量的起重机零部件在相同工作级别的起重机上使用。 Is the purpose of the professional, divide the work level for the design, manufacture and the choice of users provide reasonable unified technical basis and the reference standard, in order to obtain good economic, safe and effect, is the crane working condition get better accurately reflect. Not only that, the crane work division level can also improve the generalization level of crane parts, implement different lifting weight of crane parts used on working in the same level of the crane. 此外，起重机的工作级别也是起重机各组成部分零、部、构件设计的重要依据，也是安全检查、事故分析和报废计算的重要依据，专业角度来说，工作级别不同，安全系数就不同，报废的标准就不一样。起重机工作级别的划分原则是：荷载不同，作用频次不同的情况下，具有相同寿命的起重机划分为同一工作级别。 In addition, the work level of crane is a crane zero each component, department, the important basis of component design and safety check, scrap the accident analysis and calculation of important basis, professional perspective, the work level, safety factor is different, scrapped standards are different. The classification principle of crane operation level is that the load is different, the effect frequency is different, the crane with the same life span is divided into the same work level.