Abstract: Diamond has unparalleled advantages over other materials in many aspects such as hardness, heat conductivity, thermal shock resistance and strength. Since the artificial synthesis of diamond, it has been widely used in industry, and the corresponding preparation and application technologies have also been developed rapidly. The emergence of additive manufacturing technology has brought new opportunities for applications of the diamond. In this paper, the additive manufacturing technology of diamond and its composite materials is systematically described, and the mainstream additive manufacturing technology of diamond and its composite materials is introduced. The quality influencing factors of the additive manufacturing process are outlined, the main diamond and composite structures are sorted out, and the main applications of different structures and materials are summarized. Combining the development status of related technologies at home and abroad, the problems faced by the additive manufacturing technology of diamond and its composite materials are summarized, and the subsequent development suggestions are put forward in order to provide references for further research and application of diamond and its composite materials.