Fe-based biodegradable metals having good biocompatibility and excellent mechanical property exhibit great promise for applications in orthopedic implants, while the slow degradation rate is a major bottleneck. In this study, the surface of the porous Fe-30Mn scaffold was dealloyed by electrochemical technology. When using hydrochloric acid and sodium chloride as medium solution in dealloying treatment, micro-nano porous network and sheet-like structures were formed on the surface of the scaffolds, respectively. The contact angle and surface roughness tests showed that the two micro-nano structure significantly improved the hydrophilicity of the Fe-30Mn scaffold and enhanced its roughness. The Fe-30Mn with micro-nano porous network exhibited higher roughness and hydrophlicity than the Fe-30Mn with sheet-like structures. The static immersion method and electrochemical corrosion test were used to evaluate the degradation rate of the before and after alloyingthe scaffolds. The results showed that the construction of surface micro-nano structure could accelerate the degradation of the scaffold. The in vitro cell culture using MC3T3-E1 cells showed that all porous Fe-30Mn scaffolds had good cytocompatibility. The above results confirmed that the Fe-30Mn scaffold had a suitable degradation rate and good biocompatibility after electrochemical dealloying treatment, suggesting its great clinical application prospect in the fields of bone repair.