Light-off protection circuit and light-off protection method of optical transmission equipment

The invention is applicable to the technical field of the Ethernet, and provides a light-off protection circuit and light-off protection method of optical transmission equipment. The light-off protection circuit of the optical transmission equipment includes a first control module, a second control module, a first protection module and a second protection module; by means of the light-off protection circuit of the optical transmission equipment, when the first control module and/or the optical transmission equipment are abnormal, the second control module can controls the first protection module to cut off the path between the first control module and the optical transmission equipment and controls the second protection module to make the path between the second control module and the optical transmission equipment closed, the second protection module sends a light-off command to the optical transmission equipment, the optical transmission equipment can thus conduct light-off operation according to the light-