Abstract: As a kind of composite material designed by space continuous network configuration, the ceramic-metal co-continuous composite owns some special characteristics such as the resistance of friction and wear, high thermal shock resistance, low thermal expansion coefficient and so on, which make it has broad application prospects. Inside, the intrinsic properties of porous ceramic preforms as the ceramic reinforcement in the co-continuous composite have important impacts on the overall performance of the composite. In this review, the main progress in the current preparation methods and surface modification of porous ceramics are systematically analyzed, and both the preparation technology and the performance research of ceramic-metal co-continuous composite are summarized. Finally, we outline the four major challenges that may be encountered in the future development of ceramic-metal co-continuous composites.