The graft copolymerization of vinyl monomer onto carbon black with,respectively,ceric ions, n butylithium,acetylacetonate copper complex and manganic pyrophosphate complex as initiator were studied. The effects of initiator concentration, monomer concentration and reaction time on the percent graft have been investigated. The structure and properties of grafted carbon black were characterized with the help of TEM, FT IR and Light Adsorption Ratio. The results showed that the highest percentage of graft could be achieved by means of n-butylithium initiating system and the percentage of graft was as high as 200%.But the percentage of graft was only about 30% with the various redox system.The dispersed stability of grafted carbon black was improved obviously in the dispersing medium.