Abstract: Flat-plate loop heat pipe (FLHP) is a loop-structured device with a flat evaporator, which utilizes the principle of phase change of gas and liquid for efficient heat transfer. Due to its alignment with the advancement trend in electronic technology and its excellent long-distance heat transfer performance, the flat plate loop heat pipe has a wide range of potential applications in fields such as aerospace vehicles, electronic equipment cooling, and waste heat recovery. Therefore, this article provides an overview of the efforts made by researchers in recent years regarding the wick structure, working fluid, operational characteristics, theoretical models, and unconventional configurations of FLHP. It summarizes the current research status in these areas and proposes future development trends for FLHP, aiming to contribute to the development of advanced two-phase cooling technologies.