The invention discloses a unified network configuration and control method supporting the packet/circuit mixed exchange network, and the configuration and control method can realize unified control for the packet/circuit heterogeneous exchange network and greatly reduce end-to-end routing time delay. Each circuit exchange subnet is provided with a virtual router, and the virtual routers and practical routers form a virtual network topology which is used for routing calculation and connection control. Part of bandwidth resource is separated from each circuit exchange subnet to form a catching layer, and residual resources form a load layer. Fixed connection among all edge node pairs of the subnet is established in the catching layer. When a serve crossing the subnet arrives, data transmission is carried out via fixed connection of the catching layer, and new connection is established for the service in the load layer. After new connection is established, service carried in the catching layer is switched to newly established connection of the load layer, and resource of fixed connection of the catching layer is released.