An optical add-drop multiplexing optical splitter, wherein the optical add-drop multiplexing optical splitter includes: a trunk input end, a branch input end, a trunk output end, a branch output end, an optical add-drop multiplexer, a An optical splitter, a first detection circuit, and a control circuit; the optical add-drop multiplexer includes an optical switch. The detection circuit is used to detect whether the main road fails, and in the case of a main road failure, the working mode is switched from the first working mode to the second working mode to realize the automatic disaster recovery of the main road and ensure the normal communication of the branch road. The above solutions realize the disaster recovery function without using the integrated amplifier. No manual intervention is required, the disaster recovery response speed is fast, the disaster recovery effect is improved, and the economic loss caused by the interruption of system business transmission is greatly reduced. The adopted optical switch device is small in size, requires little structural space, and has low structural design complexity, so that the structural complexity is reduced to reduce cost and improve reliability.