In order to improve the flame retardancy, salt resistance, water resistance and organic solvent resistance of acrylate latex film, modified acrylate emulsion was prepared by using 2- hydroxyethyl methacrylate phosphate (PM- 2), vinyl triethoxy silane, 2- acrylamide -2- methyl propane sulfonic acid (AMPS) as modifier. When the ratio of butyl acrylate (BA) to methyl methacrylate (MMA) is 46%: 54%, the latex film has good film-forming performance, moderate flexibility and milky white appearance; When the amount of emulsifier was 6%, the dosage of KPS was 1.5%, the amount of ethoxy silane was 4%, the dosage of AMPS was 1%, and the amount of PM-2 was 5%, the emulsion had good stability, excellent storage stability and calcium tolerance. the prepared modified PDDA emulsion had good stability, storage stability and calcium ion resistance stability. The organic solvent resistance of the latex film improved from being dissolved in an organic solvent to having an oil absorption rate of 196.53 %. The tensile strength was 7.12 MPa after modification. Elongation at break can reach 450%. It can be seen that the stability of the comprehensive modified emulsion, the water resistance, organic solvent resistance, mechanical strength and flame retardancy of the latex film are significantly improved. This study provides a reference for further modification research and application of polyacrylate.