The soft imaging fiber bundle is widely applied in the fields of medicine,industrial microscope,as well as science research,spaceflight,and military etc.for its advantageous imaging characteristic and banding flexibility.How to precisely couple the fiber bundle in the optics system is the key.This article summarizes the imaging characteristic of fiber bundle and its application background,on that basis,to analyze the coupling approaches and equipment selecting.The attention was focused on the possibility of optical coupling through even refractive lens,meanwhile,illustrating a kind of design and result analysis for lab pictures of visible light.