本文采用秦勒级数展开估计土层参数随机性对场地传递函数的影响。对单层土模型在土层参数服从独立高斯分布假定下进行了公式推导和实例计算，比较了不同的泰勒级数阶次、土层参数变异系数以及阻尼比对传递系数随机性的综合效应．结果表明，即使在小参数摄动范围内采用一阶泰勒级数也是不够的；一般情况下采用二阶泰勒级数即可给出满意的估计． In this paper, the Qinle series expansion is used to estimate the influence of the randomness of soil parameters on the site transfer function. Based on the assumption that the soil parameters are independent of Gaussian distribution, the formula and example calculation of single-layer soil model under different Gaussian distribution are carried out. The effects of different Taylor series, soil parameter variation coefficient and damping ratio on the randomness of transfer coefficient are compared. The results show that it is not enough to use the first-order Taylor series even in the small parameter perturbation range. Generally, the second-order Taylor series can give a satisfactory estimate.