The invention provides a traffic protection method and a traffic protection device, which are applied to a CE dual-homing asymmetric accessed PWE3 network. The traffic protection method comprises the steps of: creating a bypass PW between two PE which are accessed by a CE in a dual-homing manner; with regard to any PE accessed by the CE in a dual-homing manner, sending a message to a CE through an AC when the access circuit AC between the PE and the CE takes effect and the PE receives the message from a PW connected with the PE; and sending the message via the connected with the PE when the AC between the PE and the CE fails and the PE receives the message from the PW connected with the PE, so that the message is sent to the CE through the other PE accessed by the CE in a dual-homing manner. The traffic protection method and the traffic protection device accelerate the service convergence speed during AC failure.