Abstract: In order to promote the high and stable yield of soybean,Liangdun,Ruisheng and 35% Dokfo seed coating agents were used in artificial climate box pot and field plot experiments to screen the seed coating agents with anti low temperature chilling injury and good field application effect.The results showed that three all kinds of coating agents had certain anti-low temperature effects,there was no significant difference between Liangdun and Ruisheng,and there was significant difference between them and 35% Dokfor.The results of field plot experiment showed that the emergence rate of control was 87.7%,the yield was 16 32.1 kg·ha^-1,and the emergence rates of three seed coating treatments were 95.7%,93.6%and 92.4%,and the yield was1 826.9,1 787.2 and 1 726.9 kg·ha^-1.Compared with the control,the yield increased by 194.8,155.1 and94.8 kg·ha^-1 respectively,and the yield increased by 11.9%,9.5%and 5.8%,which was significantly different from the control.All kinds of coating agents could achieve the purpose of better seedling protection and strengthening,disease prevention and stress resistance,and increase soybean yield,and play agood effect on promoting sustainable and stable yield and yield increase of soybean,from the analysis of output and economic benefits,in large-scale production,Liangdun was preferred,followed by Ruisheng.