Considering the conditions of temperature, humidity, wind speed and sunshine duration, the temporal and spatial distri-bution of temperature-humidity index ( THI) and wind effect index (K) were calculated at 22 weather stations in the Three Gorges Reservoir catchment from January, 1995 to December, 2010 based on GIS technology. The general distribution trend on climate suitability for human settlement in Three Gorges Reservoir was analyzed. The change in climate suitability for human settlement was analyzed before and after impoundment based on the first storage stage of the Three Gorges Project in June, 2003. Correlation anal-ysis of water level and meteorological elements were also investigated. Results show that the climate is not comfortable from Novem-ber to March in the next year due to the cold temperature. Similarly, the climate is also not comfortable from June to September due to the hot weather. The average annual THI and K exhibit obvious regional difference. The integrative trend of THI and K decreases progressively from central to east and west areas. Climate suitability has changed obviously since the accomplishment of the Three Gorges Project. The results of Pearson's correlation coefficients showed no correlation between THI, K and water level before June 2006, whereas water level showed significantly positive correlation with THI and negative correlation with K after that time.%运用GIS技术,在充分考虑气温、湿度、风速以及日照等条件下,计算了1995年1月至2010年12月三峡库区22个气象站点的温湿指数和风效指数及其时空分布,对三峡库区人居环境气候适宜性的总体分布趋势进行分析.并以2003年6月三峡工程一期蓄水作为时间中点,分析了三峡工程蓄水前后库区人居环境气候适宜性变化,同时对库区水位与气象要素的相关性进行定量分析.结果表明:从11月到翌年3月,库区气候偏冷,属于较不舒适人居环境；夏季的6-9月,整个库区气候偏热,属于较不舒适的人居环境；库区年均温湿指数和风效指数均呈现明显的地区差异,整体表现为由库区中部向东西递减的趋势；库区气候适宜性指数在三峡工程前后变化明显,库区水位与气候适宜性因子在2003年6月以前没有显著的相关性,在2003年6月以后,与温湿指数呈显著正相关,而与风效指数呈显著负相关.
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