Composite electrode material of the lithium secondary battery and a lithium secondary battery

A lithium secondary battery composite electrode material for lithium secondary batteries, lithium secondary battery in which the composite electrode material comprises at least: nano-electrode active powder coating layer and the electrode active powder coated surface. Wherein the coating layer is composed of nano-metastable state polymer, Compound A, Compound B or a combination thereof, wherein the polymer compound A is a monomer having a reactive terminal functional group, the compound B is a heterocyclic aromatic group initiator derivative, and the weight ratio of the nano coating layer of the composite electrode material of the lithium secondary battery is 0.005% to 10%.