A range extender vehicle comprises: a turboshaft engine (1) arranged on a vehicle frame (12) chassis, a turboshaft engine controller (2), a generator (3), a battery pack (4), a battery controller (5), a driving motor (6), a battery heat radiator (7), and a gas storage tank (9). A signal end of the turboshaft engine (1) is connected to the turboshaft engine controller (2). A transmission shaft (1-6) is connected to a rotatory shaft of the generator (3). The generator (3) outputs an electric energy to the battery pack (4) and the driving motor (6) respectively. The battery pack (4) and the driving motor (6) are connected together and are connected to the battery controller (5) at the signal end. The transmission shaft of the driving motor (6) is connected to wheels (11). A cold air channel of the battery heat radiator (7) leads to the battery pack (4). A gas pipeline of the gas storage tank (9) is connected to a gas inlet pipeline of the turboshaft engine (1). The present invention forms a highly efficient, stable, and environmental friendly system, and has advantages of a high power to weight ratio, a low power consumption, a low emission, a low noise and vibration, eliminating the need for an exhaust gas treatment system and being easy to maintain, and having a long serving life.