Abstract: Aiming at the prevalent problem of fine migration during the development of unconsolidated sandstone reservoirs, this paper systematically elaborates on its research progress and development directions. In terms of research methods for fine migration, experimental physical simulation and numerical simulation methods have been mainly developed. Experimental physical simulation is direct and realistic, enabling both microscale and macroscale studies; the numerical simulation method features low cost and flexible parameter control, which can quantitatively analyze and predict different mechanisms and dynamic changes during the fine migration process. Regarding the mechanism of fine migration, the classic DLVO theory (Derjaguin-Landau-Verwey-Overbeek theory) and hydrodynamic explanations have been established, which can qualitatively or semi-quantitatively describe the detachment and migration of fines. Based on this, fluid velocity, viscosity, salinity, temperature, and pH value have been identified as the key factors inducing fine detachment and migration. Drawing on the above mechanistic understanding, a comprehensive control strategy has been proposed, including optimizing the compatibility of injected fluids, controlling production pressure difference, and integrating chemical inhibition methods. Currently, the research field of fine migration has expanded from traditional waterflooding reservoirs to complex scenarios such as tight reservoirs, shale oil reservoirs, as well as polymer flooding, heavy oil thermal recovery, natural gas hydrate exploitation, and gas storage reservoir construction. In the future, it is necessary to further deepen the research on high-precision characterization technologies and numerical simulation in aspects such as the establishment of multi-physics field coupling models, and the integration of digital intelligence with interdisciplinary applications, so as to provide accurate prediction and optimized decision support for the development of complex reservoirs.