Abstract: In this study, 128 F_2:3 families were obtained from representative Suwan inbred line T 32（female parent） and core inbred line Qi 319（male parent） from PB group, and the normality test and correlation analysis were performed for 8 yield-related traits in this population. The results showed that the variation of yield-related traits was larger, and the traits presented an approximate normal distribution. There was a very significant positive correlation between 100-grain weight and grain length and grain width, and a very significant negative correlation between row number per ear and grain width. And, ear length was significantly correlated with row number per ear and grain number per row. Ear diameter was positively correlated with 100-grain weight, but negatively correlated with bald tip length.There were rich genetic differences in this population.