Abstract: The aim was to study the relationship among maize agronomic traits and research the genetic differences in maize hybrids. The genetic distance and correlation coefficient were calculated by using the systematic cluster analysis method based on 13 agronomic traits of 11 maize varieties. The results showed that the 11 varieties were divided into four groups, and the first group included QIV9, QIV10, QIV5 and QIV6; the second included QIV1, QIV2 and QIV4; the third included QIV3, QIV11 and QIV7; the fourth included QIV8. The 13 agronomic traits were divided into 4 groups by variable cluster analysis. Ear weight, net weight per ear, yield, ear row number and bare tip length were in the first group; ear height, row grain number, water content, axle weight and ear diameter were in the second group; ear length and hundred-grain weight were in the third group; the plant height belonged to the last group. This study defined the relationship of maize traits and varieties, and provided scientific basis for the breeding and development of maize hybrid.