The present document relates to a tunnel multiplexing method for a linear protection group and a tunnel tail node. The method includes: setting linear protection configuration information, wherein a public network label is configured associatively with an active/standby status of its corresponding tunnel, and a private network label is configured associatively with an active/standby status of a valid tunnel of a protection group corresponding to the private network label; after receiving a data message, a tunnel tail node searching for active/standby status corresponding to the public network label and the private network label according to the public network label and the private network label in the data message, and judging whether the active/standby status corresponding to the public network label is consistent with the active/standby status corresponding to the private network label; if consistent, the tunnel tail node forwarding the data message, and if inconsistent, discarding the data message.