A hybrid power direct-current electric transmission rail vehicle comprises a vehicle body, a bogie, a machine room, a driver cab and a vehicle hook. A traction motor is mounted on the bogie and connected with an axle gear box fixed to a bogie wheel pair. The traction motor, an electric storage device, an electric storage device management system, a power generating unit, a rectification device, aDCDC converter, a vehicle manipulating device and a power system controller constitute a power transmission system. The electric storage device, the electric storage device management system, the power generating unit, the rectification device and the DCDC converter are fixed to the vehicle body, and the vehicle manipulating device is mounted in the driver cab. The hybrid power direct-current electric transmission rail vehicle can operate through sole power supplying of the electric storage device, the electric quantity of the electric storage device can meet the daily operation requirement ofthe engineering vehicle, noise and discharge are reduced, and the environment-friendly and energy-saving effects are achieved; and the hybrid power direct-current electric transmission rail vehicle can also operate through power supplying of the power generating unit and can further operate through joint power supplying of the electric storage device and the power generating unit, the operation requirement of the vehicle under the limit work condition can be met, the configuration requirement of the electric storage device is reduced, and the vehicle cost is reduced.