By taking needled-carbon fiber felts as framework,C/C composites with different density were fabricated by chemical vapor infiltration method (CVI),and then C/C-Cu composites were made by squeeze casting technique. Flexural properties of C/C-Cu and C/C containing different components content were tested and investigated.The experimental results indicate that flexural strength of C/ C-Cu composites with the density of 4. 59 g/ cm3 is higher than that of C/ C composites with the density of 1. 85 g/ cm3 in xydirection. Those C/ C-Cu composites in which copper matrix plays a role of toughening and strengthening have certain plasticity;flexural strength of C/ C-Cu composites with the density of 2. 04 g/ cm3 is lower than that of C/ C composites with the density of 1. 85 g/ cm3 in xy-direction.Those C/C-Cu composites with dispersive copper matrix have no plasticity.