简要分析了新、老QJ500～QJ502三个锻件标准类别划分情况,通过对新、老标准分类的对比,指出新标准分类的不足之处,并提出了合理分类的设想。介绍了三○七厂实施新标准采取的措施 This paper briefly analyzes the classification of new and old QJ500 ~ QJ502 three kinds of forgings standards, points out the deficiencies of the new standard classification by comparing the new and old standard classification, and puts forward the idea of ​​reasonable classification. Introduced the measures taken by the 307 Factory to implement the new standard