The heat resistance, environmental protection performance and storage stability of T1168H environmentfriendly high temperature impregnating resin were studied. The application performance of T1168H in traction motor was tested on a sample coil. The results showed that the temperature index of T1168H resin reached 222 ℃. Besides, T1168H resin had the advantages of low volatile content, no toxicity and environmental protection, and storage stability. The coil impregnated with T1168H resin exhibited excellent insulation performances in breakdown voltage, insulation resistance and dielectric loss factor. This material could meet the traction motor insulation requirements.