Network protection method, device, node, system and storage medium

The embodiment of the invention provides a network protection method and device, a node, a system and a storage medium. The method is applied to a current node, at least two nodes are included before the current node, the current node is connected with the last node in the at least two nodes through a working channel and a protection channel, and the method comprises the steps that the current node obtains defect processing time corresponding to the working channel and the protection channel; and processing the defect in the corresponding channel according to the defect processing time, so that the working channel of the current node does not generate the defect earlier than the protection channel, and the protection channel of the current node does not disappear the defect earlier than the working channel, thereby preventing the upstream protection group switching from triggering the downstream protection group switching. The overall protection switching time is shortened, and the switching efficiency is imp