Alumina dispersion strengthened copper (ADSC) composite was prepared by reaction synthesis (RS) process. Studies show that nano-sized γ-Al2O3 particles of about 10 nm in diameter are homogeneously distributed in copper matrix. A coherent interface relationship with (002)Cu // γ-Al2O3,[110]Cu// [011]γ-Al2O3 characterizes along the explored interfaces of the composites. The composites obtain high tensile properties. Namely the tensile strength can reach to 570 MPa and the yield strength can reach to 475MPa at room temperature. Meanwhile, the softening temperature is higher than 1173 K. The electrical conductivity of sample is 85% IACS and the Rockwell hardness can reach to 86 HRB.