The invention discloses a link switching method and system. The method comprises the following steps: when service data transmission is performed by using a main link, and when it is detected that the main link is faulty, generating a link switching instruction; switching the main link for transmitting service data to a standby link for transmission in response to the link switching instruction, wherein the standby link is established according to the first attribute information of the main link, and the second attribute information of the standby link is matched with the first attribute information of the main link. The robustness of the network can be improved.