Raw materials that nanometer V2O5, nanometer Cr2O3 and nanometer carbon were calcinated in N2 atmosphere after dried and mixed by high energy milling, then VN/CrN nanocomposite were synthesized. The products were characterized by XRD、TG-DSC、SEM、BET and TEM. The results show that VN/CrN nanocomposite with an average crystallitesize of 40 nm can be synthesized at 1200 ℃ for 2 h. The as-prepared nanocomposite is mainly composed of VN, CrN and VCrN2. These 3 constituents are all face center cubic crystals and belong to space group Fm3m. Different weight percent of nanocomposite was used as additive and was added to the vitrified bond. The test result shows that when w (composite)=0.2%, the bending strength and liquidity could be increased by 20% and 50%, respectively. When w (composite)=1.0%, the bending strength and liquidity reach the maximum, which are 115.6 MPa and 207.2% , respectively.