Abstract: To find the best combination of the highest seed setting rate and yield,experiments on different varieties,sowing date,density and fertilization was performed in six factors and five levels,the results showed that the varieties 0103-3,sowing date on May 20,667m^2 sowing quantity was 3.0 kg, 6.6 kg nitrogen and P2O5 2.0kg,K2O 4.5kg,yield reached the highest; Variety 0103-3,sowing date on May 30,667m^2 sowing quantity was 3kg,no nitrogen,2kg P2O5,K2O 3kg,seed setting rate reached the highest.Factors affecting the yield of buckwheat as follow：varieties〉sowing date〉sowing quantity〉phosphate〉nitrogen〉potash.