The invention relates to an anode material of a lithium ion secondary battery and a preparation method of the anode material of the lithium ion secondary battery, belonging to the technical field of lithium ion batteries. The preparation method comprises the steps of dissolving Zn(NO3)2.6H2O and Mn(NO3)2 at molar ratio of 1:2 into deionized water, stirring for 10-20min, adding with a precipitator-ammonia water until the pH value is equal to 7.0-7.5 while stirring, stirring to be in a viscous state at 80-95 DEG C, adding with saccharose and stirring uniformly, wherein the molar ratio of the saccharose to Zn(NO3)2.6H2O is 1:1, burning at 200-280 DEG C until the burning is finished, and treating at 600-900 DEG C for 6-20h to obtain the anode material-ZnMn2O4 of the lithium ion secondary battery. The anode material of the lithium ion secondary battery has high capacity and stable circulating rate performance.