Wang, W. He, X.Y. Lin, L. Wu, F.F. Zhang, Q. JACoW Geneva, Switzerland 978-3-95450-182-3 10.18429/JACoW-IPAC2017-TUPIK064 English 1839-1841 TUPIK064 alignment storage-ring software closed-orbit Windows Contribution to a conference proceedings 2017 2017-05 http://dx.doi.org/10.18429/JACoW-IPAC2017-TUPIK064 http://jacow.org/ipac2017/papers/tupik064.pdf With the development of technology and theory of particle accelerator, the new particle accelerators will be built in the near future. Comparing with the running accelerators, higher efficiency and accuracy of installation and alignment are required. It is necessary for all the storage ring magnets to be placed with a high relative accuracy to meet the stringent demands of accelerator physics. Smoothing analysis is a practical method considering both relative accuracy and work efficiency. This article mainly introduces the principle and application of smoothing analysis.