本文研究了辽宁东部山区４个主要林型的林下植物种类多样性规律。采用了Ｓｈａｎｎｏｎ－ｗｉｎｎｅｒ多样性指数、Ｓｉｍｐｓｏｎ优势度和均匀度等几个主要参数进行计算分析。结果表明，多样性指数为０６６０８～２７８０２，优势度为００７２８～０７３５３。杂木林多样性指数高于其他人工林，落叶松林植物种类多样性高于红松林。随着林龄的增长，落叶松林多样性呈递增的趋势，红松林呈下降的趋势；优势度的变化规律则与此相反。 In this paper, the species diversity of undergrowth in four main forest types in eastern mountainous area of ​​Liaoning Province was studied. The main parameters of Shannon-winner diversity index, Simpson dominance and evenness are calculated and analyzed. The results showed that the diversity index was 06608 ~ 27802, and the dominance was 00728 ~ 07353. The diversity index of mixed wood is higher than that of other plantations, and the diversity of plant species in Larix forest is higher than that of Korean pine forest. With the increase of forest age, the diversity of Larix gmelinii forest showed a trend of increasing while that of Korean pine forest decreasing. The law of dominance changed in the opposite direction.