Abstract: Three unidirectional carbon fiber composites impregnated with molten epoxy resin were prepared from T800H carbon fiber, M40J graphite fiber, and their mixtures containing alternating and parallel tows of 12 K fibers with a volume ratio of 1∶1. Their tensile strength and modulus in directions parallel (0°) and perpendicular (90°) to fiber axis as well as the compressive strength in quasi-isotropic(＋45°/0°/-45°/90°)_4S after a drop weight impact according to ASTM 7136/7137 were investigated. Results indicate that the 0° tensile modulus of the mixed composite observes the laws of mixing, the 0° tensile strength and inter-laminar shear stress negatively deviate from the laws of mixing, and the 90° tensile strength and the compressive strength positively deviate from the laws of mixing. Compared with the T800H composite, the 0° tensile modulus of the hybrid is increased by 13%. Compared with the M40J composite, the compressive strength of the hybrid is increased by 35%. The hybrid composite has both a high tensile modulus and a high compressive strength.