The embodiment of the invention provides a method for realizing optical link fault identification, which relates to the technical field of communication, and comprises the following steps: acquiring performance data on network equipment, and extracting characteristic parameters of the performance data; identifying a fault mode in the optical link according to the characteristic parameters. The problems of difficult fault condition identification, slow processing and the like caused by huge equipment quantity, many line faults and difficult manual troubleshooting condition acquisition in the optical link are solved; the fault can be quickly identified when the fault occurs, and the troubleshooting efficiency is improved; and when the hidden danger of the optical link does not cause a fault,performance data degradation can be found in advance through characteristics, and identification, early warning and the like are carried out.