Abstract: Leaf area index is a key indicator of leaf area change of crop population,and also,an important parameter for studying crop photosynthesis,transpiration,and biomass formation,etc．Base on the Logisitic model, in combination with the field experiment data of leaf area index and developmental stages data of spring maizein Liaoning Province in 2011-2013, the regression model was constructed for the revised MODIS LAI products. The growth of the maize divided into two stages using the anthesis stage, The paper built the Logisitic model to simulate the whole growth period of spring maize, and constructed the various correction model of the MODIS LAI product. The Logisitic LAI was highly significant correlation with the MODIS LAI product, especially for quadratic polynomial model, whose determination coefficient reached to 0.975. Using the field experiment data in 2013, the correction model was tested, the error of MODIS LAI product was depressed from 45% to 10%.