The demand for 5G Optical module greatly exceeds that for 4G, especially for the front Optical module. Low cost is one of the main requirements of the 5G industry for Optical module. The return in 5G covers the metropolitan access layer, convergence layer and core layer. The required Optical module has little technical difference from the Optical module currently used in the data center. The access layer will mainly use Optical module with 25Gb/s, 50Gb/s, 100Gb/s and other speeds, and the convergence layer and above will mostly use DWDM Optical module with 100Gb/s, 200Gb/s, 400Gb/s and other speeds.