Abstract: The continuous carbon fiber bundle was separated to single fiber tapes by the air comb , used as the reinforced materials in the carbon fiber/ phenolic resin composites af ter being t reated by 60 % nit ric acid. The microst ructure characteristics of the composites were investigated by scanning elect ron microscope , Raman spect roscopy ,etc. The result s of the mechanical test indicate that the composite reinforced by the continuous separated carbon fibertape has doubled it s flexural st rength and t ripled it s interlaminar shear st rength but losing some impact st rengthcompared to the composites reinforced by the continuous carbon fiber bundle.