CaCuO 2 content has been optimized for two powder process. The experimental results indicate that as precursor powders have 5% excessive CaCuO 2, the critical current density of tape increases about 10%. During the reaction process, excessive CaCuO 2 afford enough liquid phase which accelerate the 2223 phase formation, but too much CaCuO 2 (>15%) will produce impure phases at grain boundary. Large impurity particles decrease the texture degree of the 2223 phase and critical current density of the tape.