Disclosed is a multiplex section protection switching method for multiple element network system and inter network elements, comprising: a network element (B or C) configured with inter network elements multiplex section protection, and a network element (D) configured with pseudowire redundancy group, wherein the network elements configured with inter network element multiplex section protection packages the switching state into packets and sends them to the network element configured with pseudowire redundancy group protection during the switching of the work link or protect link. After the network element configured with pseudowire redundancy group protection has parsed the received packets, it extracts the switching state, and after making a decision based on the switching state it performs the switching of the pseudowire redundancy group protection. The application of the present invention allows the pseudowire side to receive the switching state of the multiplex section protection side while also accurately receiving the switching state, thus preventing situations where the switching time is too long or the switching results are erroneous.
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