The correlation between plant density and growth and quality was studied using 8 different plant-type varieties of maize.The results showed that plant density influenced the maximum LAI maize.The plant height and ear height was positively correlated with plant density,while the stem girth was negatively correlated with plant density.The protein and fat content was negatively correlated with plant density,while starch content was positively correlated with plant density.The results suggested that proper plant density was 45 000,50 000 and 60 000 plants per hectare for plane leaf-type varieties,middle leaf-type varieties and tight leaf-type varieties respectively.