Abstract: The grey related degree analysis was employed to investigate the relationship between plot yield with corn type traits and yield traits.the results showed that： the relative order of yield and characteristics factor was leaf spacing kernel per row grains plant height grain weight per plant stem diameter ear diameter ear length ear height leaf number tassel branch number Leaf angle leaf area bare tip length ear row number;The correlative order between Yield traits factors with type traits various factors was defferent and the correlation was complex.