The CuAg coating was deposited on the surface of carbon fiber fabric by electroless plating process to make a new millimeter wave passive countermeasure materials. The surface microcosmic appearance,resistances and the Radar cross section(RCS) values of CuAg deposited carbon fiber fabric were measured. Results show that CuAg deposited carbon fiber fabric has better uniformity,luster,adhesion and conducting ability. The RCS values increase with the increasing of conducting ability of metal deposited carbon fiber fabric and the RCS value of CuAg deposited carbon fiber fabric is 92.3% of the caculated value. The CuAg deposited carbon fiber fabric would be an efficient materials to interfere millimeter wave.