The formulation of a dispersible 5% mass fraction polyfungicidal oil suspension was screened.Wet grinding process is adopted.The dispersing medium,emulsifier,dispersing agent and structural adjustment agent and their dosage in the formula were screened by vertical sanding machine and laser granulator.Mineral oil is used as the oil phase medium to increase the suspension stability of multi-kill oil and play the role of increasing efficiency.Under the above method,the optimized formulation of dispersible oil suspension with multiple fungicides was determined:5%(mass fraction) of the multi fungicide raw material,10% mineral oil emulsifier,2% AEO-7 emulsifier,4% P6 dispersant,3% 869 structure adjusting agent,and 76% mineral oil dispersion medium.The selected multi fungicide dispersible oil suspension agent has been tested for cold and hot storage stability,and all its indicators meet the standards for oil suspension agents.