Abstract: through the relativity of agronomic characters of 28 main plant breeds in Heilongjiang province and yield factors, the results showed : plant height is remarked significant positive to panicle length, converse third burl length, converse third leaf length; Among the factors of field, grain number is remarked significant positive to theoretic yield, the correlation coefficient is 0.535（r0.05=0.374 r0.01=0.478 n=28）；grain number is remarked positive or remarked significant positive to blade leaf width, converse second leaf length, converse second leaf width, converse third leaf length, converse third leaf width; leaf width is remarked negative or remarked significant negative to seed-setting rate and remarked positive or remarked significant to theoretic yield.