Prepared cationic acrylic emulsion with excellent properties by 2-EHA and MMA with nonionic emulsifier as only emulsifier,MAA as the polymerization hydrophilic monomer,the cationic initiator 2,2′-azobis(1-methylethylidene)bis 4,5-dihydro-1H-imidazole dihydrochloride as polymerizing initiator,post addition of cationic surfactant 16-29(hexadecyltrimethyl ammonium chloride).The dosage of nonionic emulsifier Emulgen 1150S-70 to polymerization stability,the dosage of initiator to monomer conversion,the dosage of MAA to polymerization and film adhesion,glass transition temperature to film properties,the dosage of cationic surfactant 16-29 to film adhesion and yellowing resistance were tested.The results show that the 6%dosage of nonionic emulsifier to total monomer weight has best polymerizing stability,the 0.3%dosage of cationic initiator to total monomer weight has high monomer conversion,the 2%dosage of MAA to total monomer weight has good stability and film performance,the glass transition temperature with about 25.3℃ has good film properties,the 0.2%dosage of cationic surfactant 16-29 has good adhesion and yellowing resistance.