NOVELTY - The device comprises tubular reaction devices that are connected in series to form and amplify a device for preparing fuel by discharging and cracking water-vapor to produce hydrogen and reduce carbon dioxide, a power supply for supplying power, and a gas inlet pipeline of hydrogen, carbon dioxide and steam. The tubular reaction device comprises a first tubular quartz glass/ceramic (1), a first tubular metal net discharging positive pole (2), a first tubular reactor (3), a first tubular metal net earthed pole (4), and a high-voltage pulse power supply (5).    USE - The device is useful for preparing fuel by discharging and cracking water-vapor to produce hydrogen and reduce carbon dioxide.    ADVANTAGE - The device ensures simple preparation of the fuel without any pollution.    DETAILED DESCRIPTION - The device comprises tubular reaction devices that are connected in series to form and amplify a device for preparing fuel by discharging and cracking water-vapor to produce hydrogen and reduce carbon dioxide, a power supply for supplying power, and a gas inlet pipeline of hydrogen, carbon dioxide and steam. The tubular reaction device comprises a first tubular quartz glass/ceramic (1), a first tubular metal net discharging positive pole (2), a first tubular reactor (3), a first tubular metal net earthed pole (4), a high-voltage pulse power supply (5), a second tubular reactor, a second tubular metal net earthed pole, a second gas outlet, a second tubular quartz glass/ceramic, a second tubular metal net discharging positive pole, a second pressure buffering ball, a first gas inlet, a first gas outlet and a first pressure buffering ball. The first tubular metal net earthed pole is arranged on an inner wall of the first tubular reactor. The first tubular quartz glass/ceramic and the first tubular metal net discharging positive pole are arranged in the first tubular reactor. The first tubular quartz glass/ceramic is arranged in the middle of the first tubular reactor. Equal amount of radicals or hydrogen atoms are generated in directions of the first and second tubular reactors. The first tubular metal net discharging positive pole is arranged on the inner wall of the first tubular quartz glass/ceramic. The first gas inlet, the first gas outlet and the first pressure buffering ball are arranged on the first tubular reactor. A positive pole of the high-voltage pulse power supply is penetrated through the first and second tubular reactors and connected with the first and second tubular metal net discharging positive poles. A negative pole of the high-voltage pulse power supply is penetrated through the first and second tubular reactors and connected with the first and second tubular metal net earthed poles. The second tubular quartz glass/ceramic, the second tubular metal net discharging positive pole and the second tubular metal net earthed pole are arranged in the second tubular reactor. The second tubular quartz glass/ceramic is arranged in the middle of the second tubular reactor. The second tubular metal net discharging positive pole is arranged on the inner wall of the second tubular quartz glass/ceramic. The second tubular metal net earthed pole is arranged on an outer wall of the second tubular quartz glass/ceramic. The second gas inlet, the second gas outlet and the second pressure buffering ball are arranged on the second tubular reactor. An INDEPENDENT CLAIM is included for a method of preparing fuel by discharging and cracking water-vapor to produce hydrogen and reduce carbon dioxide using a device.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a water vapor discharge cracking hydrogen production carbon dioxide reduction device.    First tubular quartz glass/ceramic (1)    First tubular metal net discharging positive pole (2)    First tubular reactor (3)    First tubular metal net earthed pole (4)    High-voltage pulse power supply. (5)