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用聚类分析法对中国二叠纪华夏植物群２５ 个分布区、８３１ 种进行古生物地理区划，与以往定性分析结果相互借鉴。结果表明原划分方案总体上得到验证，华北区内似存在更次一级的植物地理单元。
Cluster analysis was used to analyze the paleobigeographical division of 831 Chinese Permian Cathaysian flora and draw lessons from the qualitative analysis results. The results show that the original sub-sub-program has been verified, there may be more sub-level plant geography units in North China.