▎ 摘　　要

NOVELTY - Composite conductive agent comprises a core body and a shell layer distributed and bonded on the surface of the core body, where the core body includes a two-dimensional conductive material, and the shell layer includes a one-dimensional conductive material. USE - Used as composite conductive agent. ADVANTAGE - The conductive agent remains stable, has high efficiency and high conductivity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the agent comprising performing a first surface modification treatment on a one-dimensional conductive material to obtain a modified one-dimensional conductive material, performing a second surface modification treatment on the two-dimensional conductive material to obtain a modified two-dimensional conductive material, mixing the modified one-dimensional conductive material and the modified two-dimensional conductive material with a solvent to prepare a mixture suspension, removing the solvent, and drying to obtain composite conductive agent; (2) a conductive plastic masterbatch, comprising a conductive agent and a plastic auxiliary agent, where the plastic auxiliary agent is mixed with the conductive agent, and the conductive agent includes the composite conductive agent or the composite conductive agent prepared by the preparation method as mentioned above; and (3) a conductive plastic, comprising a plastic base resin, and composite conductive agent, or conductive plastic masterbatch.