▎ 摘　　要

NOVELTY - The method comprises (S1) providing a carbon material preform, forming the carbon material preform by laminating and needling carbon fiber mesh and carbon cloth, and laying a powdery carbon-based catalytic material in the laminate of the carbon material preform, where the amount of the carbon-based catalytic material gradually decreases from the middle of the carbon material preform to both ends along the thickness direction of the carbon material preform, and (S2) placing the carbon material preform in an inert atmosphere environment, passing a carbon-containing gas under preset deposition conditions to make the carbon-containing gas react under the catalytic action of the carbon-based catalytic material, and subjecting the carbon material preform to in-situ densification treatment to obtain an initial carbon material body. USE - Method for preparing carbon material body, which is used in electronic, communication, high temperature device and other fields in high temperature devices. ADVANTAGE - The method shortens the production period, improves the whole density uniformity and internal integrity of the carbon material body, can change the traditional single gas diffusion from the outer surface to the product to generate cracking carbon, avoids uneven density, improves the carbon body, external density, and internal structure integrity, and improves the mechanical property and anti-corrosion performance of the product, and prolongs the service life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a carbon material body prepared by the above-mentioned preparation method. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart illustrating the method for preparing carbon material body (Drawing includes non-English language text).