Abstract: Graphitized carbon nanosheets were prepared by molten salt method with diaminomaleonitrile as raw material, iron trichloride as catalyst precursor, and ZnCl₂-KCl as molten salt medium. The effects of reaction temperature and salt to reactant mass ratio on the phase composition, microstructure and degree of graphitization of the product were investigated. The results show that the degree of graphitization and the proportion of flake structure in the product increased with the increase of reaction temperature and salt to reactant mass ratio. When the reaction temperature was 1 000℃ and the salt to reactant mass ratio was 40:1, the graphitized carbon nanosheets with diameter of 2-10 μm and thickness of 30 nm were obtained.