Spiral-wound heat exchanger has compact structure, withstand large temperature difference, and high operating pressure. Widely used in various production processes. Due to the different spiral radii lead to different tubes length of layers. The traditional method of calculation does not take into account these differences, so there are some differences in the results with the actual situation. In this paper, the traditional calculation formula were theoretical derivation, obtained correlation correction formula, calculated different correction factor of common heat exchange tubes. The results were validated by CFD software. Quantitative results showed that the modified heat transfer coefficient calculation method will help improve the accuracy of the inner tube heat transfer coefficient.