With the continuous increase of subway lines in China，infrastructures such as reinforced concrete and buried pipelines are widely used in subway systems. The leakage of stray current in the subway will cause serious damage to the infrastructures，and the corrosion of concrete reinforcement and buried metals deserves high attention of the urban operation and maintenance departments. This paper introduces the current status and progress of researches on stray current metal corrosion at home and abroad from the aspects of metal corrosion and stray current modeling under stray current. Finally，the system comparison and prospect of the stray current modeling schemes are discussed.