Abstract: Abstract:This paper studies the different stages of corn through the application of GreenSeeker determine different varieties of corn under different nitrogen Normalized Difference Vegetation Index and the changes of leaf chlorophyll content and their relevance.The results showed that the chlorophyll content of corn at different period and the NDVI values are different,chlorophyll content and NDVI values are increased with the amount of nitrogen,the maximum fertilizer increase large,chlorophyll increase of 33%,NDVI increase of 7.25%,the chlorophyll and NDVI showed a significant positive correlation.The different varieties of corn increase different,Zhengdan 958 and Jinong 302 are better than Nongda 588.