Due to the exceptional physical properties of diamonds, they have found extensive utility in mechanical processing and wear resistance. Brazing technology facilitates the chemical and metallurgical amalgamation of diamonds with brazing alloys, resulting in heightened bonding strength. Laser heat sources, characterized by their high energy density, brief interaction periods, and minimal heat-affected zones, have emerged as the avant-garde and focal point in diamond brazing. This article systematically expounds upon the procedural methodologies and factors influencing the performance of laser-brazed diamond joints. It comprehensively outlines the influence patterns of brazing material composition, brazing interface microstructures, and laser process parameters on brazing performance. The article provides an intricate exposition of the physical properties and microstructural evolution of brazed joints, concurrently offering insights into the evaluation of joint reliability. In conclusion, this paper summarizes the existing challenges in diamond laser brazing, delineating directions for further research with the aspiration of serving as a reference point for advancing research and application in the domain of diamond brazing.