Interdisciplinary scientific research is getting more and more attention, and it is impossible to use traditional evaluation methods to evaluate this type of research. Aimed to solve this problem, the paper introduces a new method, PRP-index, for evaluating the journals of different research fields proposed by Vinkler, the method is based on the information included in the papers with high citations. In view of the fact that the production has too great an impact on the evaluations, this study makes some modifications on it. The calculation process is analyzed. The similarities and differences compared with H index are summarized. As an example, the PRP-index and H index of 111 core journals in 6 different research fields are calculated, the result and reasons are analyzed. The empirical research shows the effect of the PRP-index in evaluating the scientific journals of different research fields.%针对目前跨学科研究越来越多，传统期刊评价指标不适合跨学科期刊评价这一问题，介绍由Vinkler提出的一种评价期刊影响力的PRP指标，该指标通过挖掘期刊中高影响力论文的引文信息来评价期刊质量，同时以每一篇精英论文在本领域的被引量排名为依据进行学科领域特征的控制，从而可实现跨学科领域的期刊评价。但由于Vinkler使用的精英论文集界定方法对期刊发文量大小过于依赖，使得评价结果过于偏好发文量大的期刊，为解决这一问题，对精英论文集的界定方法加以改进。通过对6个学科领域、111种核心期刊的实证分析，进一步阐明其计算步骤和效果，并分析其与期刊H指数的异同。实证分析结果表明，改进后的PRP指标基本能够实现跨学科期刊评价，与H指数相比，由于使用PRP指标对样本期刊进行评价，得到的分数值更加离散，从而具有更好的区分度；由于精英论文的被引量都会对结果产生影响，从而在一定程度上克服了H指数较容易受人为控制这一缺陷。
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