A protection method, system and device in the packet transport network

A method of protecting a network packet transport, where a protection path for data flow service carried on a shared protection ring network packet transport, establishing the flow of data service includes the least a first flow of service data and a second data stream service, and the protection path comprises a protection path wrapping and protection path steering, the method comprising: sending the first data stream service through wrapping protection path; suspend, by a node data stream service, shipping to the protection trail wrapping the second data stream subsequent to the first service data flow service, and temporarily storing the second service data flow; and completely go through the second time the first service data flow through the node service data flow and switch the second data stream temporarily stored service road to the path protection protective wrapping steering; where, after sending the first data stream service across the road protective wrapping, the method further comprises: adding an identifier after the first data stream service, the full step for the second time of the first flow service data flow by the node service data comprises: receiving the identifier of the node service data flow; wherein the method further comprises: receiving the data stream node service request message indicating that protection data flow service is protected; and suspension by node data stream service, shipping to the protection trail wrapping the second data stream subsequent service includes: suspend, by the node data stream service, shipping to road protective wrapping of the second data stream service according to the request message protection.