▎ 摘　　要

NOVELTY - Preparing carbon cage material with controllable size involves expanding electrochemical expansion active material by electrochemical method under the action of the electrolyte to obtain the expansion core, coating the surface of the expansion core obtained by using the precursor material to obtain the coating, and carbonizing the coating obtained to obtain the carbon cage material with controllable size. USE - Method for preparing carbon cage material with controllable size as carbon material in catalysis, energy storage, filtration, heat exchange, gas adsorption liquid adsorption, electromagnetic shielding or radar stealth. ADVANTAGE - The method enables to prepare carbon cage material with controllable size in a simple manner with improved flexiblilty.