Based on HSC, a computational chemistry software, the thermodynamic analysis and equilibrium composition calculation were carried out for vacuum carbothermal reduction of a multi-component and multi-phase complex system composed of vanadium-titanium magnetite and reductant. The result of thermodynamic analysis showed that Fe is the ultimate stable phase for carbothermal reduction of ferriferous oxides, the reaction Gibbs energy of producing TiC is the lowest among all possible carbothermal reduction of titanium oxides above 1 600 K, whereas the reaction Gibbs energy of producing VO2 is the lowest among the carbothermal reduction of V2O5 between 600 K and 1 600 K, and VC can be obtained only above 1 348 K. High temperature can facilitate the production of VC. The equilibrium composition calculation showed that under the pressure of 2 Pa, the stable existing temperature of Fe is between 400 ℃ and 1 300 ℃, the stable existing temperature of TiC is between 900 ℃ and 1 300 ℃, and the stable existing temperature of VC is between 800 ℃ and 1 300 ℃.
