To analyze corona resistance performance of enameled wire used for the inverter motors in the production process of that, using electromechanical universal testing machine to simulate the stretch of corona resistant enameled wire in the production process of insulation system for the inverter motor. First of all, corona resistant enameled wires were tensile using electromechanical universal testing machine, the elongation of enameled wires were 10%, 15% respectively. Then, initial enameled wire, enameled wire with 10% elongation and enameled wire with 15% elongation were breakdown voltage test and corona resistance test. The results showed that breakdown voltage of enameled wire with 10% elongation and enameled wire with 15% elongation were little worse than that of initial enameled wire, the breakdown voltage retention rate of enameled wire with 15% elongation was more than 85%. Corona resistance time of enameled wire with 10% elongation and enameled wire with 15% elongation were much worse than that of initial enameled wire, corona resistance time of enameled wire with 15% elongation was litter worse than that of enameled wire with 10% elongation. The corona resistance time retention rate of enameled wire with 10% elongation was less than 20%.