▎ 摘　　要

NOVELTY - Preparation of carbon fiber preform comprises providing carbon fiber cloths, obtaining carbon fibers obtained by first weaving of carbon fiber bundles, preparing metal layer on surface of carbon fiber bundle in carbon fabric cloth, obtaining first modified carbon fiber fabric, forming metal layer as transition metal, soaking first modified cloth in dispersion liquid of carbon nanofiber material to obtain second modified carbon cloth, and weaving second modified cloths to obtain final product. USE - The method is used for preparing carbon fiber preform. ADVANTAGE - The method enables to prepare carbon fiber prefabricated body, which has excellent product performance, and rapid densification, shortens the preparation of carbon-based composite material or ceramic based composite material of the process period, reduces the production cost, and increases the specific surface area of the carbon fiber preform, and has excellent adsorption effect between the transition metal and the carbon nano material.