Crop growth directly depends on natural elements such as precipitation, light and temperature, and which is most sensitive to global climate change. Based on the meteorological observations and solar radiation data of Henan Province from 1960 to 2015, the corn climatic production potential of 159 county-level spatial units was estimated by using the gradual correction method and the planting space of corn was optimized. The results showed that under the background of global climate change, driven by both temperature and precipitation, the climate productivity potential of maize in Henan Province showed an inverted U-shaped dynamic change from 1960 to 2015. The space of high climate potential of maize production continued to migrate to the west of Henan Province, and the disadvantaged climate potential areas were concentrated in the north of Henan Province since 2000. And 61.11% of the advantage cultivation area coincided with the advantage potential area, but there was a big deviation between the other potential areas and the current situation of planting areas. There were three types of corn planting: increasing planting scale appropriately, decreasing planting scale gradually and maintaining stability.