The film of La-Ni alloy was prepared by electrodepositing method in an aqueous solution. The structures of film before and after charge-discharge cycles were measured by XRD and the surface feature was observed by SEM. The electrochemical hydrogen storage performance of the film was studied by cyclic voltammetry and electrochemical impedance spectrum. The results showed that the film had a good electrochemical activity, unnecessary for an activation procedure and the maximum electrochemical capacity was 156 mAh/g.