Abstract: C/C composites-CuCrZr joints were obtained by a simple active brazing process with Cu-3.5Si brazing filler metal and pure copper interlayer. And a micro-machined technique by means of laser was applied on C/C surface, resulting in a zig-zag interfacial structure between C/C and brazed seam. The results showed that the use of copper interlayer exhibits a significant effect on mechanical strength and thermal shock resistance of the C/C composites-CuCrZr brazed joint. Moreover, joint with zig-zag interfacial structure can further improve the mechanical properties of joint.