A turbocharged natural-gas engine comprises a first drive system (201), a second drive system (202), a third drive system (203) and a fourth drive system (204). The first drive system (201) comprises a gas storage cylinder (72), an eighth motor (65), an axial flow compressor (68), a combustion chamber (71), a first safety device (69), a second safety device (79), an electric ignition device (54), a third drive device (96), a nozzle (102), a turbine (205), a turboshaft (206) and a ninth bracket (70). The gas storage cylinder, the eighth motor, the axial flow compressor, the combustion chamber, the first safety device, the second safety device, the first lever braking device, an electric ignition device, the third drive device and a nozzle are arranged on the ninth bracket; the eighth motor is connected with the axial flow compressor, and the axial flow compressor is driven by the eighth motor.