Analysis on several influencing factors of output of Grain in Henan Province

This paper discusses influencing factors of grain in Henan Province with GIS,Grey Incidence and Principal Component Analysis.Results indicate that the difference of climate grain production potential has little influence on output of grain.The social and economic factors have prominent influence,and both output of grain per area and sown area of grain have most prominent influence.Except rural persons engaged in agriculture,the other investment factors have equal influence and there is biggish space in improving output of grain.There is negative correlation between rural persons engaged in agriculture and output of grain,and population is not the influencing factor.