为了摸清1960年以来内蒙古地区农业气候热量资源基本特征及变化规律，利用1960—2015年内蒙古13个农业气象观测站点的气候资料，结合内蒙古玉米品种分布，通过中心趋势、变化趋势、稳定性、聚类、变异系数等方法进行气候诊断。结果表明：（1）2015年后，日平均气温稳定通过0℃、5℃、10℃初期比1960s提前1~10天，终日推后1~10天，持续日数延长1~18天，和林、临河最明显，准格尔、宁城、商都最稳定；（2）纬度较低3个站点的各界限温度的积温线性变化趋势均不显著，呼伦贝尔东部和河套西部的5个站点的各界限温度的积温线性上升趋势显著，且积温均值2000年前后变化显著；（3）各站点抽雄—吐丝期活动积温变异系数最大，与近年来内蒙古低温冷害常出现时间吻合，春玉米关键期吐丝—成熟期变异系数较低，热量盈余可减少前期低温的不利影响，即温度异常对产量造成的影响不大。“,”To study the basic characteristics and change rules of agricultural climate’s heat resources since 1960 in Inner Mongolia, based on the meteorological data of 13 agricultural meteorological observation stations from 1960 to 2015, combining with maize varieties distribution, we did climate diagnosis by methods of central tendency, change trend, stability, cluster analysis, variation coefficient and so on. The results showed that: (1) after 2015, the daily average temperature stability by 0℃, 5℃, 10℃ was 1-10 days earlier than that of 1960s, the end day was postponed by 1-10 days, the lasting days extended for 1-18 days, it was most obvious in counties of Helin and Linhe, and stable in counties of Zhungeer, Ningcheng and Shangdu; (2) the linear change trend of accumulated temperature of boundary temperature was not significant in three stations with low latitude; the linear upward trend of accumulated temperature of boundary temperature in each of the 5 stations in the east of Hulunbuir and the west of Hetao was obvious, the mean accumulated temperature changed significantly around 2000; (3) the variation coefficient of active accumulated temperature from tasseling to silking stage in each station was the largest, the time was consistent with chilling injury occurrence in Inner Mongolia, the variation coefficient in the critical period of spring maize growth, from silking to maturity stage, was low, the surplus heat could reduce the negative impact of the previous low temperature, namely, the temperature anomaly caused little impact on yield.