Based on the 1961-2015 ground surface data from 55 meteorological stations in the summer maize plating area of the North China Plain,spatiotemporal distribution and variation of heat and solar resources in annual scale and in different periods were analyzed.In this study,active accumulated temperature over 10℃(DT10)and solar radiation were used as the indices of heat resources and solar resources,respectively,and the impact of the changes in heat resources and solar resources on maize potential yield was also calculated.In the past 55 years,DT10 in the maize growing season has significantly increased by 75.4℃·d,and all the contour lines of accumulated temperature have obviously shifted toward north.As for the solar radiation in maize growing season,a significant decreasing trend was found for each station.In the last 15 years,the DT10 increased by 8% while solar radiation reduced by 16.2% compared to that in 1961-1980.Overall,climate change increased heat resources and reduced solar resources in the North China Plain,which had positive and negative effects on the maize production in the North China Plain.In recent 55 years,photosynthesis-temperature potential productivity of maize showed significant decreasing trend with trend value -28.3kg·667m~(-2)·10y~(-1)(P<0.05).The area of high photosynthesis-temperature potential yield has also decreased in different period,indicating that the negative effect of the reducing radiation resources on photosynthesis-temperature potential productivity was greater than the positive one due to the increase in heat resources.There is still a lot promoting room for maize productivity in the study area,for the maize yield per unit area only reaches 27.5% of the photosynthesis-temperature potential yield.Further research is needed by comprehensively considering the influence of other climatic factors like precipitation,as well as social factors like agronomic measures.