Abstract: Through field screening, the excellent summer maize hybrid combination was selected for comparative identification. The results showed that there were significant differences in yield among different maize hybrid combinations, and the number of rows per ear, the number of grains per ear and the quality of grains per ear were significantly correlated with the yield, which could be used as the main reference agronomic traits in maize field screening and identification. Among them, ear length, ear diameter, growth period and plant height also had certain effects on the formation of yield and could be used as auxiliary reference agronomic traits.Through the regression and path analysis of maize agronomic traits, it can be seen that ear quality is the main agronomic trait affecting maize yield, and plays an important role in increasing yield.