Abstract: The effects of the Rare Earths(RE) on the corrosion resistance and structure of the electro brush-plating Ni-P alloy coating have been investigated. The results obtained from the immersion test and the polarization curves showed that the corrosion resistance of the coating could be improved obviously with a certain amount of RE in the bath. The X-ray,TEM, EDS composition analysis showed that the RE could improved the amorphism of the Ni-P alloy coating. And the probable mechanism of the RE to improve the amorphism has been proposed.