Belonging to technical area of inorganic synthesis, and preparing anode material of lithium ion battery, the method modifies laminated structured material Li [Ni1/2Mn1/2] O2 in use for lithium ion battery. Characters are that coprecipitation is prepared from carbonate as precipitating agent; carrying out pretreatment at 400-850 deg.C for precursor i.e. coprecipitation under inert or reductive atmosphere. Advantages are: simple technique, good repeatability of operation, short cycle, low production costs, obvious effect of modification, lowered mixed arrangement of anode material Li/Ni to 6.0-6.5 %, stable laminated structure, and reversible capacity being as 85-200mAh/g.