Modified green coke material as well as preparation method and application thereof

The invention provides a modified green coke material as well as a preparation method and application thereof. In the polarization structure of the modified green coke material, the sum of the proportions of the long and fine fiber tissues and the wide-area structure is 55-99%; in the modified green coke material, volatile components are greater than or equal to 1% and less than 5%. According to the modified green coke material provided by the invention, long and fine fiber structures and wide-area structures in modified green coke are increased, volatile components are effectively reduced, light components are further eliminated, and the self-bonding characteristic of raw materials is eliminated, so that further agglomeration is avoided in the subsequent heat treatment process of preparing graphite; the graphite negative electrode material is prepared from the modified green coke material, so that the graphitization degree, the specific capacity and the compaction density of an artificial graphite negative e