太原钢铁公司花巨款进口的大型齿轮增速装置为过盈配合，曾因事故多次停产，给国家造成重大经济损失。传统的齿轮弯曲强度计算方法无法考虑过盈配合的预应力，因而设计结果可能偏离实际并引起严重后果。本文介绍了用大型结构计算程序SAP5对太钢齿轮强度进行计算的结果，并与传统方法的结果作了对比，为此类问题的计算和分析提供了一种行之有效的新方法。 Taiyuan Iron and Steel spent huge sums of money to import large-scale gear acceleration device for the interference fit, has repeatedly discontinued due to accidents, causing major economic losses to the country. Traditional methods of calculating the flexural strength of gears can not account for prestressing of the interference fit, so the design results may deviate from reality and cause serious consequences. This paper introduces the calculation results of the strength of Taigang gear with SAP5, a large-scale structural calculation program. Compared with the results of traditional methods, this paper provides a new and effective method for the calculation and analysis of such problems.