Electrocatalyst for fuel cell membrane electrode and preparation method thereof and fuel cell membrane electrode

The invention relates to the fuel cell field and discloses an electrocatalyst for fuel cell membrane electrode and a preparation method thereof and a fuel cell membrane electrode; the electrocatalyst is characterized in that the electrocatalyst is prepared by loading precious metals on composite carrier and the composite carrier is carbon carrier deposited with water-retaining substance; in the electrocatalyst, the content of the water-retaining substance is 0.3-10wt% and the content of the precious metals is 10-60wt%. An electrode can be prepared by adopting the conventional method and using the electrocatalyst prepared by the method of the invention which is used as anode catalyst and the membrane electrode with good moisture-holding ability can be obtained; in the preparation method, a moisture-holding layer is needed to build and no moisture-holding substance is needed to add in the proton exchange membrane, thus avoiding the problems such as the increment of the internal resistance of cells which is caused by the addition of the moisture-holding substance in the moisture-holding layer and the proton exchange membrane, and providing a simple and efficient approach for preparing wetting-proof membrane electrode.