Abstract: Galvanized high-strength steel is widely used in the field of automobile manufacturing due to its good ductility, high strength and high corrosion resistance. Resistance spot welding is an important connection technology in white body welding. During the resistance spot welding process, the galvanized layer will melt and penetrate into the interior of the welded points under the action of resistance heat, forming liquid metal embrittlement (LME) cracks on the welded joints. These cracks not only reduce the ductility of the material, but also affect the service performance of the welded joints. This paper elaborates on the generation mechanism and physical mechanism of LME cracks, reviews and summarizes the key characteristics of LME cracks, focuses on exploring the main factors and prediction methods that affect the sensitivity of LME cracks in resistance spot welded joints, and analyzes in detail the impact of LME cracks on the service performance of resistance spot welded joints. Finally, methods to suppress LME cracks in spot welding processes are summarized, providing reference for subsequent research work and directions.