19 summer maize varieties of Lin’ao No.9, Keyu No.2, Aoyu 28, Sanbei No.2, Sanbei 89, Zhongdan 808, Banghaoyu 108, Yudan No.7, Keyu No.6, Quanyu No.9, Zhongke No.10, Denghai No.11, Lianchuang No.9, Tongyu18, Zuankababa, Taiyu No.12, Xiangnongyu No.14, Aoyu 3102 and Lin’ao No.1(as control) were selected as experiment material and randomized block was designed to compare their yields and analyze correlation between yield and agronomic characteristics. The results showed that Sanbei 89 and Zhongdan 808 had the top yields of 521.2 kg/(667 m2) and 468.3 kg/(667 m2), which were 16.4% and 4.6% higher than the control, respectively, it will be the main promotion varieties of summer maize in Hunan province. Kernels per row (r=0.887), ear length (r=0.845), plant height (r=0.691), ear height (r=0.682), 100-grain weight (r=0.395) and rows per ear (r=0.207) had a positive correlation with yield. The traits, which had no significant effect on yield, were removed through multiple regression analysis. Kernels per row, 100-grain weight and rows per ear were significant positively correlated with yield, showing path coefficients of 0.889, 0.325 and 0.286, respectively. In consequence, selection of maize variety should comprehensively consider the relationships among kernels per row, 100-grain weight and rows per ear, focusing on kernels per row and meanwhile giving consideration to 100-grain weight and rows per ear.