本文提出了本征多项式系数a_(N-1)(G)的绝对值的计算公式,对一些基本结构给出了相应的|a_(N-1)|表达式,文中用|a_(N-1)|讨论了一些芳香烃分子的位活性。对于由前线轨道理论和由分子轨道图形理论分别定义出的分子反应活性指标,本文找到了二者之间的联系。对交替烃分子位活性的讨论,两个指标的结果是一致的。对非交替烃分子的反应位活性,本文提出一个计算公式, In this paper, the formula of the absolute value of the eigen-polynomial coefficient a_ (N-1) (G) is proposed. The corresponding | a_ (N-1) | expressions are given for some basic structures. 1) | Discussed some aromatic hydrocarbon molecule activity. For the molecular reactivity index defined by frontier orbital theory and molecular orbital graph theory, we find the relationship between the two. The discussion of alternating hydrocarbon molecular activity, the two indicators of the results are consistent. On the reaction of non-alternating hydrocarbon molecules bit activity, this paper presents a formula,