The hydrogen production by water electrolysis is one of the most simple, most mature industrial methods to obtain hydrogen gas. the energy consumption of water electrolysis to obtain hydrogen gas limit the popularity of hydrogen.The Okay Energy’s pulse resonance water electrolysis technology of hydrogen gas production reduce the energy consumption of the traditional DC constant current from 5.8KWH/CBM to 3KWH/CBM.The new technology start a new beginning of high efficiency hydrogen production by water electrolysis.