Abstract: In the preparation of CuCr alloy through SHS-metallurgy method, the Al₂O₃ and Cr₂O₃ inclusions in the alloy can be dissolved by the smelting slag during the slag refining process, thus the composition of the slag is changed, and this further affects the properties of the smelting slag, such as the melting point, viscosity, density and surface tension, which poses a hindrance to the slag refining process. The effects of Al₂O₃ and Cr₂O₃ on the properties of smelting slag were researched in this paper, and the results show that: the increase of Al₂O₃ and Cr₂O₃ content can increase the viscosity, solidification temperature and surface tension of slag; Cr₂O₃ has a significant effect on the viscosity and surface tension of the slag and Al₂O₃, the solidification temperature. Al₂O₃ increases the density of melts, and Cr₂O₃ causes the density of melts to rise first and then decrease.