Composite solid hydrogen storage material and preparation method thereof

The invention relates to a composite solid hydrogen storage material and a preparation method thereof.The composite solid hydrogen storage material is formed by compositing AB5 type hydrogen storage alloy and AB2 type hydrogen storage alloy, the AB5 type hydrogen storage alloy forms island-shaped coating on the AB2 type hydrogen storage alloy, the AB2 type hydrogen storage alloy serves as an island base body, and the AB2 type hydrogen storage alloy serves as an island base body. The AB5 type hydrogen storage alloy is dispersed and adsorbed on the outer surface of the island base body; wherein the chemical general formula of the AB5 type hydrogen storage alloy is La < 1-x > Y < x > Ni < 4.5 > Mn < y > Al < 0.1 >, x is less than 0.1, and y is more than 0.2 and less than 0.6; the chemical general formula of the AB2 type hydrogen storage alloy is TiNi < 0.2 > V < a > Cr < 0.15 > Mn < b > Fe < 0.15 >, a is smaller than or equal to 0.15, and b is larger than 0 and smaller than 0.16. According to the material, the a