NOVELTY - Multi-element doped alpha -nickel(ii) hydroxide nanomaterial, comprises 2-5 metal elements, where the metal elements are any combination of aluminum, cobalt, zinc, yttrium, calcium, copper, magnesium and iron, and the total content of metal ion is 5-60% of the alpha -nickel(ii) hydroxide moles number.    USE - The multi-element doped alpha -nickel(ii) hydroxide nanomaterial is useful as nickel-hydrogen battery anode active material for electric car, electric tool and other large-power rechargeable batteries.    ADVANTAGE - The multi-element doped nano-particle is little in granularity and narrow in distribution, good in dispersion and high in activity. The four-element doped alpha -nickel(ii) hydroxide nanomaterial is mixed with industrial sized nickel with 8 wt.% to make composite electrode, which has discharge capacity of 346mAh/g with 0.5 C discharging rate and is 9mAh/g higher than 0.1 C discharging rate, and it has discharging platform, cycle period and high electro chemical performance indexes when compare to the low-element doped electrode material.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation of the multi-element doped alpha -nickel(ii) hydroxide nanomaterial, comprising: (i) configuring (in mol/l) industrial nickel solution (0.05-1.0) and salt solution of doped element (0.05-1.0) with de-ionized water, where the nickel salt is nickel nitrate, nickel sulfate or nickel chloride, the doped element is 2-5 of aluminum, cobalt, zinc, yttrium, calcium, copper, magnesium or iron, the metal salt is chlorate, nitrate or sulfate, and the mol ratio of the doped amount of manganese ion to nickel ion is 5-60%, and then adding in the dispersing agent of nickel hydroxide with 1-5% of weight, and making into mixed solution of nickel salt; (ii) configuring industrial caustic alkali solution (0.1-2) with de-ionized water, adding caustic alkali solution of proper ammonia water or ammonium into alkaline liquor and evenly stirring, and making into caustic alkali solution (0.1-2) of ammonia or ammonium; (iii) flowing two pieces of solution in steps (i) and (ii) with 15-30 dropping speed per minute and placing into a reaction container in an ultrasonic cleaner vibrating cavity so that the whole reaction process is carried out in the ultrasonic wave vibrating environment, keeping the reaction system temperature, pH value and stirring speed constant, keeping the temperature at 60 degrees C, and pH value between 8-11, keeping stirring speed at 150-1000 revolutions/minute, after dropping the reactant, continuing to stir for 5 hours until finishing reacting, and then statically placing, ageing, cleaning and filtering, drying at 60-100 degrees C, and then fetching and grinding.