Abstract: The effects of the factors（panicle number per hectare, spikelet number and seed setting percentage）on yield and the interaction among these factors have been defined through analyzing the yield of youhang 1.The analysis result show that the effect of panicle number per hectare on the yleld of youhang 1 is the greatest; spikelet number and seed setting percentage doesn’t have much effect on the yield of youhang 1.A culture techniques for the hybrid rice youhang 1 was studied by the method of quadratic regression rotation design. Five influential elements for the culture techniques were density of pp333(x1) ,planting stage(x2),planting density(x3),quantities of nitrogen(x4) and potassium(x5).The regression models of five elements with yield were established. Results showed that main agronomic practices for yield were density of pp333, planting stage，planting density and nitrogen amount. After simulated screening and optimal selection by computer,the high yield cuture techniques were 718.7~783.1 mg/kg pp333, transplanting on July10~12,as 255200~267800 hills per hm2 , 166.8~176.5 kg N per hm2 and 122.5~134.1 kg K2O per hm2.