The invention discloses a method for directly reclaiming and preparing superfine nickel powder in positive material of nickel-hydrogen batteries. The method is characterized in that firstly, a professional disassembling machine is adopted to disassemble waste nickel-hydrogen batteries to obtain positive waste material which is crushed; secondly, lixiviating is performed by adopting a sulphuric acid and oxyful system; iron is removed and then impurities are extracted using P204 from lixivium to cause impurities such as calcium, copper, manganese, zincum and the like to transfer to an organic phase and cause nickel and cobalt to be left in a water phase; thirdly, solution containing nickel and cobalt is separated and extracted by using P507 so cause the cobalt to transfer to the organic phase the nickel to be left in the water phase; at last, faffinate containing nickel is deoxidized using hydrazine hydrate to obtain the superfine nickel powder. Through the application of the method, the coefficient of recovery of nickel in the positive waste material can reach more than 98.5 percent, and the purity of the obtained nickel reaches more than 99.7 percent; and the superfine nickel powder with the average grain diameter of 400 nm and face centered cubic crystal type sphericity is obtained by applying the method.