Abstract:An environment friendly biocontrol agents Bacillus amyloliquefaciens 9601-Y2 5.0×109 cfu/mL SC was formulated though screening surfactants, thickeners, UV protectants, preservatives, antifreezes,and defoamers. It included 5.00% B9601-Y2 powder,2.50% Nongyu 34,2.00% D-425, 1.50% emulsifier OP-10,0.15% xanthan gum，0.15% urea, 0.06% methylparaben, 5.00% glycerol, 0.20% n-octanol and 83.44% water. By wet grinding the product suspension rate was over 92.00% and stable after cold and hot storage.