The invention relates to an amorphous titanium-copper-nickel based hydrogen-storing composite material and a method for preparing the same. The chemical general formula of the composite material is Ti2-xMxCu1-yNy+zNi, wherein x is more than or equal to 0 and is less than or equal to 0.5, y is more than or equal to 0 and is less than or equal to 0.3, M can react with hydrogen to generate one of metal elements of Zr, Mg, Ca or rare earth of a metal hydride, N is Al or one of transition elements of Cr, Fe, Ni, Mn and Y, and z is more than or equal to 0.5 and is less than or equal to 2.0, and z is the ratio of the weight of the N to the weight of Ti2-xMxCu1-yNy. Compared with the prior hydrogen-storing electrode alloy, the amorphous titanium-copper-nickel based hydrogen-storing composite material achieves electromechanical hydrogen storage at room temperature, and an electrode made from the material has the characteristics of low cost and high discharging capacity, thus the amorphous titanium-copper-nickel based hydrogen-storing composite material is particularly applicable to a nickel-hydrogen cell with low cost and high specific energy.