Abstract: The variations of the saturation magnetostriction constant and the magnetization-flux of the metallic glass Fe39Ni39Si8Bl2Mn2 were studied using the tension-magnetization with a large angles rotation during aging at room temperature after charging hydrogen. The results show that with the decrease of saturation magnetization, the increase of anisotropic constant and the smaller value of saturation magneto-striction constant are induced by hydrogen in metallic glass.