提出提高统计线性化精度的新方法，同时研究高阶矩传播法的计算方法，并以此方法做为衡量计算精度的标准，计算结果表明，提出的修正方法改善了计算精度，并且易于推广使用 A new method to improve the precision of statistical linearization is put forward. At the same time, the calculation method of high-moment propagation method is studied. The method is used as a standard to measure the accuracy of the calculation. The calculation results show that the proposed correction method improves the calculation accuracy and is easy to popularize