The invention provides a routing configuration method and device, applied to a controller in an SDN. The method comprises the following steps: RT attributes of a VPN example of a tenant and a routing strategy of a VPN example of an external network are configured through the controller, so that gateway equipment sets RT attributes for routing from different external network equipment according to the routing strategy, matches the RT attributes of the routing with the RT attributes of the VPN example of the tenant, adds the routing into the VPN example of the tenant after successfully matching, and guides the flow of the tenant to be forwarded to the external network. By means of the routing configuration method and device, dynamic updating of the routing on the gateway equipment can be realized.