NOVELTY - Natural gas steam reforming hydrogen production device comprises an upper end cover, a reactor main body, a flange, an outer cylinder, a burner and pre-heating coil comprising natural gas pre-heating pipe, a heating pipe and a gas pipe. The upper end cover and the reactor outer cylinder is a hollow cylinder structure. The pre-heating coil is set on the upper end cover. The reactor main body is set outside the reactor cylinder. The burner is placed in the lower part of the reactor main body. The reactor main body and the reactor outer cylinder and the upper end cover are connected by a flange.    USE - The device is used in micro fuel cell (claimed).    ADVANTAGE - The device has fast starting speed, is convenient to assemble and disassemble, and small in size, and requires less floor area.    DETAILED DESCRIPTION - Natural gas steam reforming hydrogen production device comprises an upper end cover, a reactor main body, a flange, an outer cylinder, a burner and pre-heating coil. The pre-heating coil comprises natural gas pre-heating pipe, a heating pipe and a gas pipe. The upper end cover and the reactor outer cylinder is a hollow cylinder structure. The pre-heating coil is set on the upper end cover. The reactor main body is set outside the reactor cylinder. The burner is placed in the lower part of the reactor main body. The reactor main body and the reactor outer cylinder and the upper end cover are connected by a flange. The upper part of the reactor flange outer ring is uniformly distributed with multiple holes. The inner ring is uniformly distributed with multiple holes. The reactor main body corresponding to the top part of the reactor flange position is distributed equally with same number of holes. The top part of the reactor flange is connected with reactor main body via bolts. The mixed gas inlet on the upper part of the reactor is set towards the left side flange. The synthetic gas outlet on the upper part of the reactor is set towards the right side flange. The mixed gas inlet is connected with mixed gas pipe. The synthesis gas outlet is connected with synthesis gas outlet pipe, extending upward from the upper part of the cover. Flue gas outlet pipe extends from the upper part of end cover. The reactor main body is a hollow annular structure, where the center is hollow, and the periphery is an annular cavity. The annular cavity is provided with a baffle plate, where two baffle plates with annular cavity is divided into a left cavity and a right cavity. The baffle plate part is provided with gap. The catalyst particles are distributed on the left cavity and a right cavity. The catalyst particle is nickel based catalyst. The top of the reactor main body is provided with two arc-shaped channels. The arc-shaped channels are positioned on the outer flange of reactor body and inner side of the reactor main body. The upper part of the reactor main body and flange center is provided with a through-hole. The gas pre-heating tube and a water pre-heating pipe from the upper end cover enter into the end cover cavity. The cavity gas pre-heating pipe is provided with a water pre-heating pipe on the upper end, and a spiral structure to rotate downwards. The preheating pipe and water preheating pipe is connected with the mixed gas preheating pipe through tee joint. The mixed gas pre-heating pipe is a spiral structure. An INDEPENDENT CLAIM is also include for producing hydrogen using the device, comprising (i) maintaining atmospheric pressure within the reactor, starting the burner, pre-heating of the reactor main body until the catalyst in the reactor main body reaches 150-200 degrees C, (ii) passing water through a pre-heating pipe, continuously heating burner, increasing the temperature of reactor main body to 500-800 degrees C, and (iii) passing natural gas via natural gas pre-heating pipe, controlling the flow rate of water and natural gas in pre-heating pipe to 2:4, passing water and natural gas respectively through each pre-heating pipeline via a gas pre-heating pipe and combining into gas mixture, pre-heating to 500-800 degrees C, carrying out reforming reaction in the reactor main body left cavity, and then entering through the lower part of baffle gap into the right chamber of the reactor, and reacting to produce hydrogen-rich gas, which is led out by the synthesis gas outlet pipe.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the natural gas steam reforming hydrogen production device.