Using polyamide imide(PAI) resin as base material, a wear-resistant insulating coating for anti-rolling torsion bar of railway vehicle was prepared. The effects of different resin base materials on the electrical insulation and wear resistance of the insulating coating were studied. The wear-resistant insulating coating was characterized by SEM, IR and TG. The results showed that when a polyamide imide resin was selected and polytetrafluoroethylene and molybdenum disulfide lubricant were used, the electrical strength of the wear-resistant insulating coating reached 57.2 kV/mm and the volume resistivity reached 3.2 × 10^(14)Ω·m, the dynamic friction coefficient was as low as 0.078 and was intact after 3 million times.