Abstract: On account of the advancement of SPE water electrolysis technology, the improvements of electrocatalyst of hydrogen evolution and oxygen evolution is introduced in detail and the preparation methods of the catalyst are summarized covering our works on TiN impregnation-thermal decomposition for the synthesis of water electrolysis catalyst with TiN nanoparticles as precursors and a trend to develop the supports with high corrosion resistance and low noble metal cosumption of the catalyst in SPE water electrolysis is put forward.