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Global warming has caused geographical displacements in the north of the safe corn planting in the Northeast, and the occurrence of cold damage in sensitive areas after the north boundary displacement has yet to be explored. Based on the effective accumulated temperature required for the growth and development of different maize varieties in Northeast China, combining with indicators of corn chilling injury in different growth stages, the changes in suitable areas for maize planting in Northeast China and the occurrence frequency of cold damage in sensitive areas were revealed, and the index conducts trend was analysed.The results show that the safety boundary of corn planting has been continuously moving *通讯作者:张继权(1965-),教授,博士 生导师,主要从事环境灾害风险评价与管理、 预警等方向研究 邮箱:Zhangjq022@nenu.edu.cn northwards in the past 30 years, and early maturing varieties have gradually been replaced by medium-maturing varieties; in the context of global warming, the frequency of chilling damage in most regions of Northeast China showed a downward trend, and the cold damage intensity showed a downward trend. The decline is significant, but it does not rule out the extreme cold damage in the region. Therefore, the spatial evolution rules of northern expansion and cold damage of maize planting areas under the background of climate warming were explored, which provided reference for the rational distribution of corn and prevention of cold damage in Northeast China.

Impacts of Northern Expansion of Typical Corn Planting Regions in China under the Background of Climate Warming and SpatialEvolution of Cold Damage