This study selected the mung bean Xiaominglv as material,and compared the effect of the type I biological seed coating agent （T₁）,type Ⅱ biological seed coating agent （T₂） and commercial chemical seed coating agent（T₃） on the growth and yield of mung bean by seed dressing method.The results of field experiment showed that T₁ treatment promoted plant height and dry matter accumulation of mung bean,but significantly reduced the reducing sugar content in mung bean leaves.T₂ treatment increased the accumulation dry matter of mung bean and the content of reducing sugar in leaves,but inhibited the plant height of mung bean and decreased the content of chlorophyll.T₃ treatment increased the chlorophyll content of mung bean and the content of reducing sugar in the leaves,but inhibited the plant height of mung bean and decreased the accumulation of dry matter in mung bean.T₁,T₂ and T₃ treatments increased the yield by 2.88%,10.98%,13.71%,respectively.Above all,the field experiment primarily indicated that type II biological seed coating agent can promote the growth of mung bean,and have the positive effect on the yield of mung bean.