NOVELTY - A scalable combined multi-polar electrolytic cell comprises greater than or equal to 1 electrolytic cell and external fixing device in which electrolytic cell comprises anode plate (3), cathode plate (4), multi-level electrode plate (5), electrode plate fixing device, and cylindrical insulating shell (7), anode plate and cathode plate cover both ends of insulating shell, inside of insulating shell is sealed, gasket seal (8) is set between anode plate and insulating shell and between cathode plate and insulating shell, and anode plate, cathode plate, and insulating shell are fixed together.    USE - A scalable combined multi-polar electrolytic cell for hydrogen production used for thermoelectric power generation, petrochemical industry, industrial furnace, building material, ceramic glass, defense, and nuclear energy.    ADVANTAGE - Scalable combined multi-polar electrolytic cell is environment-friendly, has strong flexibility and practicality, reduces cost, saves energy, and improves production efficiency.    DETAILED DESCRIPTION - A scalable combined multi-polar electrolytic cell comprises greater than or equal to 1 electrolytic cell and external fixing device in which electrolytic cell comprises anode plate (3), cathode plate (4), multi-level electrode plate (5), electrode plate fixing device, and cylindrical insulating shell (7), anode plate and cathode plate cover both ends of insulating shell, inside of insulating shell is sealed, gasket seal (8) is set between anode plate and insulating shell and between cathode plate and insulating shell, anode plate, cathode plate, and insulating shell are fixed together using external fixing device, bottom of insulating shell contains inlet (9), top of insulating shell contains outlet (10), multi-level electrode plate contains set of electrode plates, electrode plates are fixed along inside insulating shell using electrode plate fixing device, electrode plates are axially arranged in insulating shell, top and bottom of electrode plate have notch-type design, and 2 adjacent electrode cells share anode plate or cathode plate.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of electrolytic cell.    Anode plate (3)    Cathode plate (4)    Electrode plate (5)    Insulating shell (7)    Gasket seal (8)    Inlet (9)    Outlet (10)