For the purpose of improving the driving range and the applicability of electric vehicle, a range-extended electric vehicle using a micro gas turbine as the range-extender is designed. Firstly, the powertrain and main parts of a certain model of electric vehicle are analyzed. Then the vehicle specifications and main parts are determined according to the analyzing and calculating results. Finally the vehicle model is built in Advisor and the feasibility and fuel consumption are simulated. According to the simulating results, Gas turbine range-extended electric vehicle presented in this paper can meet the demand of most users in pure electrical mode. In range-extended mode, the equivalent fuel consumption is 2.02 L/100 km. This scheme makes vehicle adaptive to multiple kind of fuel, and compared with conventional vehicles, the energy from power grid is fully used and the fuel economy is greatly improved.