The invention relates to a composite negative
electrode material and a preparation method therefor and a
lithium ion battery. The composite negative
electrode material comprises a carbonaceous material with an embedding structure and formed by embedding first carbon component
small particles into a second carbon component framework carrier, wherein the first carbon component is converted by a
small particle precursor (green
coke and / or burning
coke and / or carbon microspheres); and the second carbon component framework carrier is converted by a binder. The composite negative
electrode materialdisclosed in the invention combines the "embedding type" structure and a "gradient type
crystal form" structure; the
small particles of different appearances are embedded in the relatively thick framework carrier to form a bigger particle; the
small particles embedded in the interior adopt a
graphite structure with the best
crystal form; the framework carrier adopts a
graphite structure with the ordinary
crystal form; and the outermost layer also can be coated with an
amorphous carbon structure with the worst crystal form. The composite negative
electrode material provided by the invention hasstructural stability, high orientation, low expansion,
high rate capability, excellent liquid absorption performance and cycle performance, and can satisfy various kinds of demands in the application.