Objective To improve the antifouling properties of Ni-P-PTFE composite coatings. Methods Electroless Ni-P-PTFE composite coating was prepared on the surface of 45^#carbon steel by Electroless plating method,and the effects of active agents and Ni-P-PTFE content in the plating solution on the PTEE content and fouling rate of the electroless Ni-P-PTFE composite coating were investigated to get the best parameters. Results As the surfactant concentration increased, the PTFE content of coating increased and then decreased, while the fouling rate of the coating firstly decreased and then increased. Conclusions The fouling rate of the composite coating reached the minimum of 0. 004 85 g / ( m²·h) at an active agent concentration of 0. 3 g / L and a PTFE concentration of 6 mL / L. At this point, the best antifouling performance was achieved for the composite coating.