保温车车体隔热层的厚度到底选择多厚比较合理,目前各国都进行了一些研究。本文简要介绍了美国与苏联的研究情况,井认为我们对此问题有研究的必要。本文从计算公式的推导、计算参数的选择、合理厚度的计算、经济效果的测算等四个方面进行了分析,认为采用本文所提的方案可为国家和铁路带来重大经济效益。 Insulation car body insulation thickness in the end choose more thick more reasonable, at present, all countries have conducted some research. This article briefly introduces the research situation of the United States and the Soviet Union and believes that we need to study this issue. This article analyzes the calculation formulas, the selection of calculation parameters, the calculation of reasonable thickness and the calculation of economic effects. It is concluded that the scheme proposed in this paper can bring significant economic benefits to the country and the railway.