本文考虑一维扩散过程的小随机扰动．我们应用随机分析方法，给出了当扰动趋于零时，平均越出时间的渐近估计和越出时间的概率估计．

In the present paper we consider the small random perturbations of one-dimensional diffusion processes. By virtue of stochastic analysis methods, we investigate the asymptotics of the mean exit times and probabilistical estimates of the exit times as the perturbations tend to zero.