Negative electrode material, preparation method thereof and battery

The invention relates to a negative electrode material, a preparation method thereof and a battery, the negative electrode material comprises an active substance and a carbon material located on at least part of the surface of the active substance, and the active substance comprises graphite; 30 points are randomly selected on the surface of the negative electrode material and are measured through a Raman spectrum, the peak area ratio of a first characteristic peak in the range of 1345 cm to 1355 cm to a second characteristic peak in the range of 1570 cm to 1610 cm is AD/AG, and the AD/AG is larger than or equal to 0.9 and smaller than or equal to 1.5; the average deviation of the peak area ratio AD/AG of the 30 test points is A, and A is more than or equal to 0.08 and less than or equal to 0.2. According to the negative electrode material, the coating uniformity of the active substance by the carbon material is relatively good, so that the capacity exertion of the negative electrode m