The invention provides a fiber operation state analysis method. A server extracts the optical plate optical power values of SDH equipment in SDH transmission network management through a data interface, and different numbers are given to the optical plates of the SDH equipment. Each SDH equipment and optical plate information in the SDH transmission network management are input into the server, and a network topology is generated and is displayed by a display unit. First class, second class, third class alarm signals are set. The server carries out statistical analysis on the optical plate optical power values of the SDH equipment in the SDH transmission network management and analyzes the attenuation condition of the optical plate optical power with time, and the attenuation condition is an optical plate laser aging condition and a cable line aging condition. The method has the advantages that according to the characteristic that the Huawei network management can monitor the characteristic of optical power, firstly the optical plate receiving and transmitting optical power of each transmission equipment is recorded, and a database is formed, an alarm is prompted if an abnormality appears, the possible abnormality of a cable (or a laser) is prompted, sufficient time is given to process a fault, and the purpose of fault early warning is achieved.