As a new type of photodetector,two dimensional material photodetector has many advantages,such as adjustable band gap,easy to fabricate flexible devices and so on.It further enriches the application of photodetectors.At the same time,two dimensional material photodetectors also need to be optimized to a certain extent,for example,to solve the problem that molybdenum disulfide is difficult to achieve bipolar regulation.This paper focuses on the enhancement of two dimensional material photodetectors by using electric fields such as ionic conductors,ferroelectric materials,and local gate and stress fields.So as to solve some problems of the detector made of two dimensional materials,analyze the shortcomings of the existing research,and look forward to its future development.It would provide a certain degree of reference for relevant researchers.