Abstract: Vacuum hot pressing sintering was used to add Cr powder to the nickel aluminum metal bond in order to improve the mechanical properties of nickel aluminum metal bond. The effects of Cr powder content and sintering temperature on the mechanical properties and microstructure of the nickel aluminum metal bond were studied. The results show that Cr can solution strengthening and the mechanical properties of nickel aluminum metal bond were improved. As the Cr content increases, the flexural strength of the bond increases first and then decreases with the increase of Cr content, while Rockwell hardness shows an overall increase tendency at 800℃.When Cr content is 12 mol%, the optimal flexural strength and Rockwell hardness are 178 MPa and 104.2 HRB, respectively, which are increased by 36.9% and 6.8%.