The present invention provides a method for establishing a route of a connection, which comprises: a route relation group is configured on a service node responsible for route calculation; the route relation group comprises a connection in which the service node is contained and other connections having route relation with the connection; when a route of a connection is requested to be established, the service node responsible for route calculation confirms the route of the connection according to the route relation group configured on the service node, and then establishes the route of the connection. A device for establishing a route of a connection is also provided in the present invention. With the present invention, the problem of high probability of route conflict in the existing connection route establishment process can be solved.