Abstract: In order to clear the relationship between new super rice ‘Songjing 15’ and the yield and to discuss its high yield mechanism, relationship between grain density, spike length, primary branch characteristics and secondary branch characteristics and yield, yield component was analyzed by correlation analysis with field plot of conventional planting adopted. The results showed that there were extremely significant positive correlations among spikelets per panicle(r=0.9887**), grain density(r=0.9768**), the number of primary branches(r=0.8047**), grain number of primary branches(r=0.9338**), the number of secondary branches(r=0.7295**), grain number of secondary branches(r=0.8606**) and the yield of ‘Songjing 15’, partial regression coefficients of maturing rate(t=2.090, P= 0.041)and spike length(t=-1.223, P= 0.048) reached significant level, these panicle traits had great influence on the yield, increasing the number of primary branches, grain number of primary branches, number of secondary branches, grain number of secondary branches was benefit to spikelet per panicle, at the same time, attention should also be paid to the ear length selection to cultivate large spike and control of seed setting rate to mine its yield potential.