Abstract: In order to understand the effects of meteorological conditions on the yield of crops，and to discuss the impact on crop yield under climate change，based on the temperature，ground temperature，precipitation，relative humidity，sunshine and evaporation data of Dandong area in 1951-2013，the changing trend of meteorological factors in Dandong area was analyzed，and the effects of meteorological conditions on the yield of maize in Dandong based on the data of annual average yield per 667 m2 and meteorological conditions in 2002-2012 were analyzed. The results showed that the changes of temperature and ground temperature showed an upward trend in Dandong area during 1951-2013，precipitation，relative humidity，sunshine，evaporation showed a downward trend，the change of relative humidity was negatively correlated with corn yield in Dandong area，temperature，ground temperature， sunshine，precipitation，evaporation had positive correlation with corn yield，in while the correlation of temperature and corn yield in Dandong area was the highest. The regression forecasting model of corn production in Dandong area was established with temperature，ground temperature，precipitation，relative humidity，sunshine and evaporation. The correlation degree between simulation and measured value of corn yield in Dandong area was 0.9496.