The meteorological data from 69 meteorological stations in rice-growing areas of three provinces and one city in southwest China over last 10 years were analyzed in this article, that combined with characteristics of rice growing period. The result showed that, the stereo-ecological region of rice-growing areas in southwest China could divide into four ecological regions(tropical rice area, warm rice area, cool rice area and cold rice area). The four area could subdivided into five ecological sub-regions (dry-heat indica sub-region, dampness-heat indica sub-region, warm indica and japonica staggered sub-region, warm-cool indica and japonica stag-gered sub-region, cold and plateau sub-region of japonica). Making the appropriate cultivation measures and scheme according to this division to guide rice growing in this area is of great significance.%通过对西南3省1市69个水稻种植区气象站点10年的气象资料进行统计分析，结合各区水稻生育期特点，把西南立体生态区划分为4个生态稻作区（热带稻作区、温暖稻作区、温凉稻作区、冷凉稻作区），并细分为5个生态亚区（干热籼稻亚区、湿热籼稻亚区、温暖籼粳稻交错亚区、温凉籼粳稻交错亚区和高原冷凉粳稻亚区）。根据这一划分制定相应的栽培措施和方案，以指导各区域水稻生产。
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