A kind of epoxy emulsifier was synthesized from solid epoxy(E20)and polyethylene glycol(PEG 4000)as raw materials by modification of maleic anhydride,glycidyl methacrylate(GMA)and organic fluorine monomer.The E20 epoxy emulsion with solid content of 50%was prepared by the reverse transformation process.The effects of the ratio of polyethylene glycol to acrylate copolymer,the amount of GMA and the amount of organic fluorine monomer on the properties of the emulsion were studied.The results show that under the conditions of emulsifier dosage of 15%of solid epoxy E20,emulsifying temperature of 70 C,emulsifying shear rate of 1200 r/min,m(polyethylene glycol):m(acrylic copolymer)=7:3,GMA accounted for 25%of the amount of acrylic monomer,organic fluorine monomer accounted for 5%of the amount of acrylic monomer,the synthesis of epoxy emulsion has good stability and corrosion resistance.