The relationship between Guan distribution and Poisson distribution of molecular weight of polymers has been given by moment analysis, which is the first step for inferring the polymerization mechanism from molecular weight distribution of addition polymer. 本文通过矩数分析给出了Poisson分布与三参数指数型分布的关系.这是由加聚物买验分布推断反应机理的初步尝试。