Provided are a method and device for negotiating a traffic path in an LAG, wherein the method includes that an aggregation port acquires indication information, wherein the indication information is used for indicating one or more groups of services or sessions needing to be borne by the aggregation ports, each group of the services or sessions includes one or more services or sessions; the aggregation port determines multiple groups of services or sessions to be borne, and/or services or sessions currently being borne by the aggregation port; an aggregation group portal to which the aggregation port belongs, performs traffic distribution according to services or sessions currently being borne by each aggregation port which belongs to the aggregation group portal. It is solved the problem in the related art that the same service or session cannot be transmitted bi-directionally on the same path, thus implementing the protection on the interconnect interface.