Fiber optic surface plasmon resonance (SPR) sensor has the advantages of high detection sensitivity,fast response speed and real-time online monitoring,and has a good application prospect in biology,chemistry,medicine and other fields.However,the traditional single-channel fiber SPR sensor has only one sensing area and can only perform one single-point measurement,which greatly limits its further development and application.The multi-channel fiber SPR sensor can make up for the shortcomings of traditional single-channel fiber SPR sensor because of its large detection flux,many detection substances,realization of temperature compensation,and elimination of various non-specific responses.The research of multi-channel fiber SPR sensor is of great significance to improve the detection sensitivity and detection accuracy of traditional single-channel fiber SPR sensor and expand its application fields.First of all,the principle of fiber SPR sensor is introduced.Then,the research progress of multi-channel fiber SPR sensor in recent years is presented.At the end,the future research direction of multi-channel fiber SPR sensor is prospected.Multi-channel fiber SPR sensor with new structure,high performance and multi-application is an important development direction of multi-channel fiber SPR sensor in the future,and the integration of new materials and new processes will surely bring the development and application of multi-channel fiber SPR sensor to a new level.