The present disclosure relates to an SDN-based VPN traffic scheduling method and scheduling system. The method includes: configuring an SDN switching device to implement establishment of a communication link between a CE device and a PE device; performing VPN configuration on a controller; distributing, by the controller, a corresponding flow table to the SDN switching device, the flow table being used to translate a repeated address within a VPN to a non-conflict space address to distinguish different VPN traffic; configuring, by the controller, different traffic scheduling paths for the different VPN traffic according to a preset traffic scheduling strategy; and distributing, by the controller, the traffic scheduling paths to the PE device.