The invention discloses a preparation method for a modified aluminum borohydride hydrogen storage material. The method comprises the following steps: mixing polytetrafluoroethylene, EDTA, nickel powder and zirconium powder according to the weight ratio of 1:(2-4):(3-7):(2-6), placing the mixed material into a pipe furnace, performing protection by adopting an argon gas atmosphere, wherein the gasflow rate is 100-300mL/min, raising the temperature from a room temperature to the temperature of 600-800 DEG C at the speed of 3-6 DEG C/min, keeping a reaction for 1-2h, and performing cooling to aroom temperature in an argon gas atmosphere to obtain a powder-shaped mixture; and weighing the above powder mixture and aluminum borohydride according to a mass ratio of 1:(2-5), mixing the powder mixture and the aluminum borohydride uniformly, and performing mechanical ball milling under a high-purity hydrogen gas condition, wherein the ball milling time is 2-5h, the hydrogen charging protectionpressure is 1.0-2.5MPa, and the rotation speed is 400-600r/min.