Sodium metal batteries (SMBs) are regarded as highly promising candidates for next⁃generation high⁃energy⁃density energy storage systems, owing to the high theoretical specific capacity (1 166 mA•h/g) and low redox potential (-2.71 V（vs.SHE）) of sodium metal. However, the practical implementation of sodium metal anodes is significantly impeded by several critical issues, including uncontrollable dendrite growth, vigorous interfacial side reactions, and instability of the solid electrolyte interphase (SEI). Consequently, engineering a stable and robust anode interface has become a pivotal research focus for achieving high⁃performance SMBs. In recent years, researchers have proposed a variety of interfacial regulation strategies, including electrolyte optimization, artificial interfacial layer construction, application of solid⁃state or gel electrolytes, and alloying approaches. This review systematically summarizes recent progress in stabilizing the sodium metal anode interface, with a focus on the mechanismsof various interface engineering strategies and their effects on electrochemical performance. The challenges and future perspectives in this field are also discussed.