The change of morphology of Cr phase, mechanical properties and electrical conductivity of CuCr alloy under different cold deformation quantity and heat treatment were studied. The results show that when reduction is up to 70%, Cr particles are deformed heavily, and some of Cr particles are broken. After the following high temperature heat treatment, broken Cr particles in the microstructure dissolves, and tend to turn into spherical morphology. As a results the mechanical properties and electrical conductivity of CuCr alloy are improved by means of proper deformation and heat treatment, and its mechanism was analyzed from microstructure.