Super long-distance optic cable attenuation on-line monitoring device and usage thereof

The invention relates to the technical field of optical communication transmission, and is a super long-distance optic cable attenuation on-line monitoring device and a usage thereof. The super long-distance optical cable attenuation on-line monitoring device comprises a high power light source emitting device, an optical signal receiving device, a data analysis and processing device and an environmental parameter sensor, wherein the high power light source emitting device is connected with an input end of the optical signal receiving device through an optical cable; a super long-distance optical cable is provided with the environmental parameter sensor; the high power light source emitting device, the optical signal receiving device and the environmental parameter sensor are connected with the data analysis and processing device respectively through a cable. The super long-distance optic cable attenuation on-line monitoring device provided by the invention is rational and compact in structure, and convenient to use; attenuation data are obtained by calculating a difference value between transmitting end power and receiving end power, and the attenuation data are collected and stored in a background server database according to a certain time interval; current data are summarized and analyzed every week in combination with environmental data, and the change condition of optical cable attenuation along with environment is evaluated.