A kind of steady polyaniline (PANI) emulsion was prepared in this paper by chemical oxidative polymerization with SDS as emulsi?er and dopant. The phosphate-fluorocarbon acrylate (P-FAc) emulsion was also prepared. And the composite emulsion coatings of PANI/P-FAc was obtained by adding different proportions of PANI emulsion into P-FAc emulsion. The chemical structure of PANI and P-FAc were characterized by Fourier transform infrared spectroscopy. The contact angle, adhesion, potentiodynamic polarization curves, open circuit potential and electrochemical impedance spectroscopy were used to assess the anticorrosion properties of the PANI/P-FAc coatings for Q235 steel. The surface morphology of Q235 steel which removed PANI/P-FAc coating were observed by scanning electron microscope. The results showed that the coating has the best anticorrosion properties when the proportion of P-FA emulsion and PANI emulsion was 1:1. The corrosion current density was only 1.09?0-6 A/cm2, the equilibrium potential was -0.55V, and the impedance modulus reached 104.3Ω.