According to the three factors affecting the temperature ,digital elevation model (DEM ) and the normalized difference vegetation index (NDVI) of Savanna shrub and grass of Yuanjiang dry -hot valleys , the article uses the BIOCLIM model to simulate the spatial distribution of Savanna shrub and grass of Yuan‐jiang dry -hot valleys ,w hich realizes the visual expression of spatial distribution of the dry -hot valleys in Yuanjiang County .The results show that the distribution of dry -hot valleys mainly concentrates on both sides outside Yuanjiang County .The dry -hot valleys'distribution is more concentrated in the east area but more dispersed in south area .Moreover ,in recent years ,the increasing human activities have some influences on the ecological environment of Yuanjiang river valley .The model forecasts the future distribution of dry ar‐ea in Yuanjiang County ,w hich aims to provide decision support for biodiversity conservation and vegetation restoration in the area .%根据影响干热河谷稀树灌木草丛分布的温度、数字高程模型（DEM ）以及归一化植被指数（NDVI）三个因子，使用BIOCLIM模型模拟元江县干热河谷稀疏灌木草丛空间分布，实现了元江县干热河谷空间分布的可视化表达。结果表明：干热河谷分布主要集中于除元江县城外的河谷两侧，其中东部分布较为集中，而在南部地区分布较为分散。加之近年来人为活动的加剧，对元江河谷生态环境的变化也有一定影响，该模型很好地预测了未来元江县干热面积的分布情况，以期对生物多样性保护和植被恢复提供决策支持。
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