In order to understand the spatial distribution characteristics of the arbor forests in Wuzhishan, and grasp the development trend of the major forest factors, by combining the data of Four Forestry Resources Inventory of Hainan Wuzhishan, and using ArcGIS10.0 and SPSS software, the dynamic changes of land use types and arbor forests were analyzed for 15 consecutive years. The results show that (1) the arbor forest land was the main land use types in Wuzhishan area, and the number increased year by year;(2) the arbor forests mainly range in 500~1 000 meters above sea level, and the slope ranges were within the 15 °~35 ° and are adretto;(3) the arbor forest’s average age was 28.54 year-old, average tree height was 11.41 meters, average diameter was 13.45 cm, average per acre accumulation was 8.86 m3, the average canopy density was 6.09. In terms of the structure of age groups, the arbor forests mostly belong to mid-maturation and young forest, in the positive succession stage.%为了了解五指山市乔木林的空间分布特征，掌握主要林分因子的发展趋势，结合海南省五指山市四期森林资源连续清查数据，运用ArcGIS10.0、SPSS软件，对五指山市连续15 a乔木林地的变化进行分析。结果表明：（1）乔木林为五指山市主要的用地类型，且数目逐年增加；（2）乔木林分主要分布在海拔在500～1000 m、坡度在15°～35°之间向阳的空间范围内；（3）平均年龄为28.54，平均树高为11.41 m，平均胸径为13.46 m，平均每亩蓄积为8.86 m3，平均郁闭度为0.609。从龄组结构来看，大多属于中龄林与幼龄林，处于正演替阶段。
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