Direct heating electrothermal method was adopted to study the effects of different electroplating pa- rameters on the morphology of nano carbon grown on the surface of carbon fibers. The nickel plating on the sur- face of carbon fiber was treated by electroplating with different electroplating parameters. Chemical vapor depo- sition of nickel plated carbon fibers prepared by electroplating was carried out to obtain nano carbon from exper- iments. Through technique of sedimentation, the sizes and shapes of the nano carbon with different electroplating parameters were compared in order to explore the relevant effects of electroplating parameters. The research re- sults show that when the plating time is 3min, the distribution of nickel catalyst particles on the surface of car- bon fibers is uniform. The electroplating nickel is evenly distributed on the surface of carbon fiber, and it has a suitable size. The carbon fiber can produce better deposited carbon. Different shapes of nickel catalyst particles can grow on the surface of the fibers treated with different morphologies of nano carbon.