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通过对肥城煤田晚石炭-早二叠世小有孔虫动物群的研究，共鉴定出小有孔虫化石25属73种。自上而下可建立三个小有孔虫组合：ⅢMultidiscustalimuensis-Glomospira-Palaeotextularia组合，ⅡTetrataxis-Nodosaria-Palaeotextularia组合，ⅠEotuberitina-Bradyina组合。通过与其它地区小有孔虫组合对比，肥城煤田这三个小有孔虫组合的时代应分别为晚石炭世晚期（组合Ⅰ）和早二叠世早期（组合Ⅱ和组合Ⅲ）。
Through the study of the late Carboniferous-Early Permian foraminifer fauna in Feicheng coal field, 73 species of 25 genera of foraminifera were identified. Three small foraminiferal assemblages were established from top to bottom: the combination of III Multidiscustalimuensis-Glomospira-Palaeotextularia, the combination of II Tetrataxis-Nodosaria-Palaeotextularia and the combination of Etotuberitina-Bradyina. Compared with other small foraminifera assemblages, the age of the three small foraminiferal assemblages in Feicheng Coalfield should be Late Late Carboniferous (combination Ⅰ) and Early Permian (combination Ⅱ and combination Ⅲ), respectively.