NOVELTY - Device comprises a reforming hydrogen reactor, an adsorbent generator, a gas-solid separator, a storage bin, a feeding device, a steam re-heater, a waste heat boiler, a gas storage cabinet and a pressure swing adsorption device. The lower end of storage bin is connected to adsorbent regenerator by a control valve. A discharge port of adsorbent regenerator is fixed to a feeding port of reforming hydrogen reactor by feeding device. An air outlet is fixed to side of a carbon-dioxide gas cabinet. An inlet of reforming hydrogen reactor is fixed to a steam outlet of steam re-heater.    USE - The device is useful for preparing hydrogen using coke oven gas (claimed).    ADVANTAGE - The method completely utilizes heat without causing gas shortage; recycles waste gas; has high production yield; and produces product concentration based on optimization and continuous and efficient preparation procedures, and thus it produces high purity carbon-dioxide and other by-products.    DETAILED DESCRIPTION - Device comprises a reforming hydrogen reactor, an adsorbent generator, a gas-solid separator, a storage bin, a feeding device, a steam re-heater, a waste heat boiler, a gas storage cabinet and a pressure swing adsorption device. The lower end of the storage bin is connected to the adsorbent regenerator by a control valve. A discharge port of the adsorbent regenerator is connected to side of a feeding port of reforming hydrogen reactor by feeding device. An air outlet is connected to side of a carbon-dioxide gas cabinet. An inlet of the reforming hydrogen reactor is connected to a steam outlet of the steam re-heater. A coal outlet is connected to a coke furnace carbonization. The upper end of the discharge port is connected to a gas-solid separator. The gas-solid separator is connected to discharge port of a hopper. The upper end of the air outlet is connected to waste heat boiler. The waste heat boiler is connected to a drying tower. The drying tower is connected to hydrogen gas cabinet and pressure swing adsorption device by a reversing valve. The hydrogen gas cabinet is connected to the pressure swing adsorption device. An INDEPENDENT CLAIM is also included for use method of device in the preparation of hydrogen using coke oven gas, comprising (i) adding adsorbent and catalyst mixture or composite catalyst into feeding port of hopper, closing the feeding port after material addition is completed, maintaining the material temperature at 700-800 degrees C, and controlling the dropping rate of adsorbent and catalyst mixture or composite catalyst by using control valve into adsorbent regenerator; (ii) heating coke oven combustion flue gas fed into adsorbent regenerator at not greater than 1000 degrees C, heating adsorbent and catalyst mixture or composite catalyst above 900 degrees C, adjusting the feeding rate of mixture from the feeding device into reforming hydrogen reactor, reducing high-temperature of coke oven gas to 750-900 degrees C, reheating the steam generated at not greater than 750 degrees C, and feeding high temperature steam into reforming hydrogen reactor, and fluidizing adsorbent and catalyst mixture or composite catalyst; (iii) adding the materials into reforming hydrogen reactor, and introducing reduced gas into crude coal tar, CnHm, methane, carbon-monoxide catalyst and steam, and carrying out reforming reaction by allowing carbon-dioxide adsorption or composite catalyst, and taking out resulting hydrogen-rich gas and unreacted water vapor from adsorbent and catalyst mixture or Composite catalyst into the gas-solid separator; and (iv) introducing hydrogen-rich gas into gas-solid separation of waste heat boiler, and conveying into drying tower based on user requirements, and obtaining hydrogen in a concentration of not greater than 90 vol.%, when the drying tower is directly connected to an outlet of hydrogen gas cabinets or with pressure swing adsorption device, or obtaining hydrogen in a concentration of not greater than 99.99 vol.%, when the pressure swing adsorption device is connected to hydrogen gas storage cabinets.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the device.