中文摘要：

考虑了Galton—Watson过程的一些极限性质，得到了q-fn（s）收敛率的估计，并给出了limn→∞华的具体表达式。

英文摘要：

In this paper, some limit properties of Galton-Watson process are studied and the estimate of the rate of convergence of q-fn（s） is investigated, the representation of limn→∞q-fn（s）/γn is also obtained.