Graphite negative electrode material and preparation method thereof, negative electrode plate and lithium ion battery

The invention belongs to the technical field of secondary batteries, and particularly relates to a graphite negative electrode material and a preparation method thereof, a negative electrode plate and a lithium ion battery. According to the preparation method of the graphite negative electrode material provided by the invention, amorphous carbon is adopted to coat the graphite material, carbon coating is carried out in two steps, a graphitized product and a coating agent are uniformly mixed in a low-temperature mixing process, and in a high-temperature dynamic coating process, in addition to further mixing, most of light components are removed through high-temperature heat treatment; the coating agent completes polycondensation and cross-linking, and after carbonization, a surface coating layer with high isotropy degree and good coating effect is formed, so that uncontrollable agglomeration in the subsequent carbonization process is avoided. And the graphite negative electrode material which not only can real