NOVELTY - Hydrogen-purifying device (100) comprises: guiding tank (110) having first end (110a) and second end (110b), where device generates hydrogen, moisture mixed with hydrogen and impurity mixed with hydrogen; first water-absorbing material, where hydrogen passes through first water-absorbing material to remove part of moisture; porous filter material, where hydrogen passes through porous filter material to remove impurity; and second water-absorbing material, where hydrogen passes through the second water-absorbing material to remove another part of the moisture and arrives at the fuel cell (50).    USE - The device is useful for a fuel cell (claimed).    ADVANTAGE - The device: filters impurities mixed with the hydrogen, thus preventing negative effect on the fuel cell; reduces the destruction on the porous filter material by the acid substance in the moisture to ensure the good filtering effect of the porous filter material; removes rest moisture and avoid excessive moisture entering the fuel cell; and exhibits improved filtering.    DETAILED DESCRIPTION - Hydrogen-purifying device (100) comprises: a guiding tank (110) having a first end (110a) and a second end (110b) opposite to the first end, where the first end is connected to device, the second end is connected to the fuel cell (50), and the device generates a hydrogen, a moisture mixed with the hydrogen, and an impurity mixed with the hydrogen; a first water-absorbing material disposed in the guiding tank, where the hydrogen passes through the first water-absorbing material to remove a part of the moisture; a porous filter material disposed in the guiding tank and between the first water-absorbing material and the second end, where the hydrogen passes through the porous filter material to remove the impurity mixed with the hydrogen, after passing through first water-absorbing material; and a second water-absorbing material, disposed in the guiding tank and between the porous filter material and the second end, where hydrogen passes through the second water-absorbing material to remove another part of the moisture and arrives at the fuel cell, after the hydrogen passes through the porous filter material.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram of the hydrogen-purifying device.    Fuel cell (50)    Hydrogen-purifying device (100)    Guiding tank (110)    First end (110a)    Second end (110b)