以昭通市水稻为研究对象，结合昭通市气象站点1951~2015年逐日气象资料，基于稻田水量平衡和MK检验方法，分析了昭通市气候变化特征及不同灌溉模式下稻田耗水和灌溉需水量的变化规律。结果表明：昭通市年日照时数和降雨量随时间序列显著减少，而年积温显著增加；不同灌溉模式下水稻需水量ETc和渗漏量均随时间序列显著减小，但节水灌溉能够有效的降低稻田耗水量，节水灌溉稻田耗水量较常规灌溉减少21.5%；昭通市近60年，在稻田耗水量和降雨量同步减少影响下，稻田灌溉需水量随时间序列呈微弱增加趋势，但节水灌溉模式能够有效的降低稻田灌溉需水量增加雨水利用量，节水灌溉稻田较常规灌溉稻田灌溉需水量减少57%，降雨利用量提高11%。因此，大力发展节水灌溉能够有效的降低气候变化对水稻生产带来的不利影响，促进低纬昭通市高原特色农业可持续发展。

The rice water consumption and irrigation water requirements from 1951 to 2015 under water-saving irrigation and flood irrigation were investigated using calculation method of paddy water balance and Mann-Kendall analysis based on historical meteorological data. The results indicated that the sunshine duration and rainfall present significant decreasing trends during past six decades， however， the air temperature presents significant increasing trends. The rice evapotranspiration and percolation under water-saving irrigation and flood irrigation present significant decreasing trends， but the rice water consumptions were significant decreased under water-saving irrigation, the water consumption of rice under water saving irrigation decreased by 21.5% comping to that under traditional irrigation. The paddy irrigation requirements present little increasing trends with the decreases of rice water consumption and irrigation precipitation. The irrigation requirements under water-saving irrigation increasing slower than those under floods irrigation, the irrigation water demand and precipitation utilization under water saving irrigation improved by 57% and 11%, respectively, comping to that under traditional irrigation.. Thus， the adverse effects on rice production caused by climate change can be effectively eliminated by using water-saving irrigation technology.