Signal degradation alarm method and system, terminal equipment and storage medium

The invention provides a signal degradation alarm method and device, terminal equipment and a storage medium, and the method comprises the steps: writing signal degradation alarm information into a preset field of a message; and sending the message of which the preset field carries the signal degradation alarm information to a corresponding receiving end on a link, so that the receiving end starts protection switching or route reselection of the link when detecting that the preset field of the message carries the signal degradation alarm information. According to the invention, the signal degradation alarm information is written into the preset field of the message, so that the end-to-end message carries the intermediate cross-segment SD state, a related link is timely notified to carry out protection switching or route reselection, at least the problem that the link is timely notified to carry out rapid protection switching when the intermediate cross-segment link has signal degradation in an SR-TP tunnel ca