AB5 hydrogen storage alloy electrodes have some disadvantages in the process of battery charge and discharge such as grave pulverization, short cycle life, and poor cycle stability. In this paper, we selected LaMg0.26Ni3.44Co0.66Al0.14Fe0.14 alloy as raw materials and offered a method to deal with the base hydrogen storage alloy. Based on the DSC test result, the hydrogenation-dehydrogenation condition was determined and a pre-treatment of hydrogenation and copper plating followed by hydrogen release was performed for the alloy. Then the battery properties were studied. The results show that the alloy with 0.7% hydrogen mass and copper plating followed by hydrogen release possesses the max discharge capacity 318.0 mAh·g-1, the decay ratio of discharge capacity is low, and the cycle stability is good. The effect of particle size indicates that 38~48 μm mesh alloy with 0.7% hydrogen mass and copper plating followed by hydrogen release has the max discharge capacity 327.3 mAh·g-1