本文探讨利用噪声作业指数法进行职业性噪声危害程度分级，即采用Ａ计权声级和接触噪声时间为基础，提出将超过《标准》范围的噪声再分成５个级别，以利卫生监督部门据轻重缓急原则分别处理。本结果认为噪声指数法是目前能够较客观有效地进行职业性噪声危害程度分级方法之一。具有良好的可行性和实用性，并提出需要进一步改善的方法。 This paper discusses the use of noise index method for occupational noise hazard classification, that is, using the A-weighted sound level and contact noise time, proposed to exceed the “standard” range of noise is divided into five levels, in order to facilitate health supervision departments Priorities are dealt with separately. The result shows that the noise index method is one of the methods that can objectively and effectively classify the occupational noise hazards. Has good feasibility and practicability, and proposes ways that need to be further improved.