The entire process of the hydrogen supply system in hydrogen-oxygen fuel cell is discussed.The hydrogen supply system in hydrogen-oxygen fuel cell is analyzed from several main aspects of hydrogen generation,hydrogen storage,hydrogen supply pipeline and security in using hydrogen.The characters of the industrial hydrogen production system are compared with that of vehicle self-mounted type hydrogen supply system from aspects of hydrogen production and hydrogen storage.The hydrogen supply pipeline for vehicle-mounted hydrogen storage tank is analyzed emphatically,and the improving suggestions on traditional hydrogen supply pipeline are put forward.