Abstract: There are many volatile organic compounds (VOC) in the traditional insulating paints, and the pollution and energy consumption of the products are high. The special resin for UV curable environmentally friendly insulating paint of 130 thermal class was synthesized and its paint was produced. The properties of the resin and the paint were analyzed and tested by gel permeation chromatography (GPC), viscometer and other related equipments. Experimental results verify that the number average molecular weight of the resin is 1125 g/mol, the viscosity of the paint is 265 mPa·s (25 ℃), and the effective solid content of the paint is 99.2%. All the performance indicators of the prepared enameled round insulated copper wires can achieve or be higher than the existing national standards for the polyester enamel insulated wire of 130 thermal class.