ABSTRACT: In view of the traction engine produces high frequency harmonic in the excessive phase, which causes stress control type cable terminal insulation, broken rapidly, this paper studies HXD1D type of locomotive net, net flow in the excessive phase and the change of the voltage waveform distortion rate, and high frequency harmonic effect on the cable termination. Aging experiment through constructing high frequency high voltage experiment device, the use of high frequency high voltage generator of cable terminal exert different frequency and voltage, using infrared thermal imaging analysis of high frequency harmonic effects on cable terminal hot spots. In addition, by the electric field simulation. It found that under the effect of high-frequency voltage, the cable terminal outer semiconductive layer truncation of field strength is significantly greater than under power frequency voltage field. The results show that the locomotive net, net flow pressure fluctuation in the excessive phase are more noticeable, and the resulting harmonic serious, high frequency harmonic content are rich, under the action of high frequency voltage, stress control type hot spot temperature rises significantly higher than the end of the cable under power frequency voltage temperature.