This paper discussed the species and distribution patterns of small mammals in summer at Yulin district. Field work was conducted from July to August in 2010. A total of 383 individuals were captured on 3032 trap- days. The average rate of capture was 12.63%. 9 species ofsmaU mammals, belonging to 2 orders, 2 families and 5 genera, were recorded from 5 study sites. The dominant species was Suncus muninus Linnaeus, which with a total of 251 individuals accounting for 65.54%. The analysis of ecological and horizontal distribution of these captured mammals showed that the Shannon-Weiner diversity index in five communities was 1.12-2.01 and the Pielou evenness index was 0.43＂--0.71. Whittaker index was used to analyze the similarity of species in each community, and the results showed that the Whittaker index of Yulin Normal University and Beiliu village was the lowest. The Whittaker indices of the remaining four communities all were above 80%.%2010年7～8月利用铗日法对玉林地区小型兽类进行调查,共设置5个采集点.在3032个铗日中,捕获小型兽类共383只,平均捕获率为12.63%.经鉴定隶属2目2科5属9种,其中食虫目1科1属1种,啮齿目1科4属8种.以玉林师院东校区内的捕获率为最高,平均达21.41%.各物种中以臭鼩为优势种群,共251只,占所捕获个体总数的65.54%.对捕获的9种小型兽类水平分布的分析结果表明：在不同的调查地点,各物种的分布存在一定的差异.5个群落的Shannon-Weiner多样性指数在1.12~2.01之间,Pielou均匀性指数在0.43~0.71之间.利用Whittaker指数分析了各群落的相似性,结果表明除玉林师院东校区与北流的相似性系数较低（58.17%）以外,其它各群落间的相似性程度均较高,都在80%以上,挂榜山与陆川的相似性高达92.63%.
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