The effects of cured temperature， insulation platform and isolation material on the porosity and mechanical properties of vacuum formed CCF300/BA9913 resin matrix carbon composites were studied. The results show that CCF300/BA9913 get better mechanical properties and heat resistance after curing at 125 ℃ for 2 h.The porosity decreases and mechanical properties of the cured CCF300/BA9913 increases by adding 0.5 h insulation platform near the temperature （85 ℃） for lowest viscosity.The porous polytetrafluoroethylene film and semi permeable film are used to improve the air permeability during curing process and increase the mechanical properties of cured CCF300/BA9913 composite.The 0°tensile strength，0°compressive strength，0°flexural strength and interlaminar shear strength are 1 896 MPa，1 387 MPa，1 668 MPa，89.0 MPa.