Abstract: WC-Co-Ti(C,N)-Ni-Mo cemented carbides were prepared by the high temperature and high vacuum liquid phase sintering technology, and the effects of Mo mass fraction (0-1.00%) on the density, phase composition, microstructure, hardness and bending properties of cemented carbide were studied. The results show that the internal structure of the prepared cemented carbide had no defects such as voids, micro cracks and impurity segregation. The relative density of cemented carbides was larger than 99%, and the porosity was less than 1.00%; when the content of Mo was 0.50wt%, the cemented carbide had the lowest porosity and the highest relative density. The addition of Mo element effectively inhibited the abnormal growth of WC grains. The Mo content had little effect on Vickers hardness of cemented carbide. With the increase of Mo content, the flexural strength and shear strength of cemented carbide increased gently and then decreased rapidly. When Mo content was 0.50wt%, the mechanical properties of cemented carbide were the best, including Vickers hardness of 18.32 GPa, flexural strength of 3.07 GPa and shear strength of 112.08 MPa.