Abstract:In present opticalelectrical printed circuit board (OEPCB), there is a problem of low coupling efficiency of the vertical coupling structure between optical electrical devices and optical waveguides. Thus in this paper, the vertical coupling structure with traditional embedded 45° reflection micro mirror was analyzed, and a new structure with higher vertical coupling efficiency was proposed and verified by simulation with Matlab. The research shows that the new structure has low requirement for opticalelectric alignment accuracy, and it is less affected by high temperature and high pressure of traditional PCB manufacturing process and is easy to be compatible with the process.