Two-dimensional (2D) materials have emerged as promising candidates for electrochemical energy storage and conversion applications, owing to their unique structural features and exceptional physicochemical properties. However, the large-scale practical deployment of these materials remains highly dependent on the development of efficient and scalable fabrication techniques. Notably, salt-assisted synthesis strategies have gained significant attention as a versatile approach, enabling precise structural modulation and performance optimization of 2D materials while maintaining cost efficiency and procedural simplicity. This review systematically summarizes recent advances in the salt-assisted synthesis of 2D materials and highlights their emerging roles in electrochemical applications. The influences of salt media on crystal nucleation, growth behavior, and surface properties for synthesizing 2D materials are discussed firstly in this review. Furthermore, representative 2D materials synthesized via this strategy are categorized and evaluated for applications in metal-ion batteries, supercapacitors, and electrocatalysis. Finally, the prevailing challenges and future research directions are critically assessed, targeting scalable production, mechanistic understanding, and multifunctional integration of salt-assisted synthesis for 2D materials. This comprehensive overview aims to provide fundamental insights and practical guidelines for the design of high-performance 2D electrochemical materials.