Negative electrode material composite precursor, negative electrode material and preparation method of negative electrode material

The invention provides a negative electrode material composite precursor, a negative electrode material and a preparation method of the negative electrode material, and belongs to the technical field of lithium ion batteries. The method comprises the following process steps: uniformly mixing petroleum residual oil, catalytic cracking oil slurry or coal tar and lipophilic thermoplastic resin according to a certain proportion to obtain mixed oil, and curing and molding the lipophilic thermoplastic resin in the mixed oil by utilizing internal components of the petroleum residual oil, the catalytic cracking oil slurry or the coal tar and a variable-temperature variable-pressure reaction mode, carrying out dehydrogenation polycondensation to convert the mixed oil to obtain a composite carbon material precursor intermediate product; and carrying out crushing, spheroidizing shaping and heat treatment on the intermediate product of the composite carbon material precursor to obtain the composite carbon material precur