In recent years, low-dimensional materials especially 2D materials have attracted wide attention due to their novel proprieties.Plenty of devices with excellent performance have been made for different applications basing on 2D materials.In order to further explore the advantages of 2D materials and integrating them into semiconductor fabrication lines,the 2D material/Si heterostructure-based photodetectors played important roles in many different domains due to their price advantage, mature manufacturing craft and good compatibility to integrated circuits.