Natural gas hydrogen-doped mixing device

The utility model relates to a natural gas hydrogen-doped mixing device which comprises an inlet section, a gradually-shrunk transition section, an outlet section, a first gas inlet flow channel and a second gas inlet flow channel. The hydrogen-doped natural gas mixing device has the beneficial effects that no flow channel is formed in the hydrogen-doped natural gas mixing device, so that the structure is greatly simplified, and the manufacturing difficulty of the flow channel is reduced; the overall structure is similar to a frustum, and slow transition of the runner size is achieved; the direction of a mixed gas outlet of the device is the same as that of a rotating shaft of the whole structure, and a flow baffle perpendicular to the rotating shaft direction is not arranged, so that pressure drop loss can be reduced; the device is not provided with an internal flow guide body, and has a more sufficient mixing space compared with the scheme of arranging the flow guide body; according to the device, the whole