The invention discloses a method and device for realizing ring protection in VPLS. The method comprises the following steps: S1, receiving messages by a network processor, searching for VPLS ID and a message source MAC address on a MAC address forwarding table, if the VPLS ID and the message source MAC address are sought, jumping to the fourth step, and otherwise, jumping to to the second step; S2, constructing MAC address learning messages for sending to a CPU; S3, performing destination MAC address searching/forwarding on unicast messages or flooding forwarding on unknown messages by the network processor, and ending processing; S4, if input VPs of the messages are consistent with output VPs of the forwarding table, jumping to the fifth step, and otherwise, jumping to the sixth step; S5, after a hit mark of the forwarding table is refreshed, jumping to the third step; S6, writing alarm information into a MAC address drift alarming table, and reporting an alarm; S7, if the input VPs of the messages are provided with FLAPPING_DROP signs, jumping to the eighth step, and otherwise, jumping to the second step; and S8, dropping the messages, and ending processing. According to the invention, ring formation damage is effectively prevented, the realization is simple, the application scope is wider, and the deployment is more convenient.