Abstract: In order to cope with climate change and improve maize yield,the data of maize yield and meteorological factors under straw mulching and returning from 2016to 2021 were analyzed to discuss the effect of main meteorological factors affecting maize yield.The results showed that:（1）From 2016to 2021,there was a significant difference in dry matter quality during the 19years of maturity.Among them,the dry matter quality of corn was the highest in 2018and the lowest in 2016.The dry matter quality of mature corn was 372.39g in 2018,and decreased by 23.11%,21.76%,10.59%,7.26%and 6.02%respectively in 2016,2017,2019,2020and 2021compared with 2018.The output results from 2016to 2022showed that the output in 2018was the highest,which was 10 088kg·ha-1.Compared with 2018,the output in 2016,2017,2019,2020and 2021decreased by 17.60%,14.40%,2.98%,2.44%and 5.83%respectively.（2）This study showed that the output was basically consistent with the dry matter accumulation except 2021.However,the variation of maize yield in this area was not closely related to the average temperature and sunshine hours.（3）The relationship between water use efficiency of maize and annual precipitation was a parabola.The water use efficiency first increased and then decreased with the increase of annual precipitation,and there was a critical value.The correlation analysis between yield and water use efficiency showed that the changes of maize yield in this region are related to water use efficiency,but not closely.