CuCr50 powders were first activated by mechanical alloying (MA),then used to prepare the contact materials by vacuum hot pressing. The results indicate that the CuCr50 powder by MA is ametastabe and supersaturated solid solution,would dissolve during the followed hot pressing. The microstructures and properties of bulk CuCr50 materials vary with the dissolving amounts of supersaturated solid solution. A bulk CuCr50 material of high density with fine and homogeneous Cr particles distributed can be acquired at lower temperature for shorter holding time in hot pressing due to the mechanically activated effect of MA powders. As a result,the synthetical properties of bulk CuCr50 materials fabricated by this method are superior to those prepared by other methods.