This application discloses a data processing method and apparatus, and a switching device. The data processing method includes: obtaining a destination address of a data packet received by an input port; determining an available output port based on the destination address; determining a busy degree of the available output port, when there is no non-busy available output port in the available output port, determining a quantity of footprint queues on the available output port, and selecting an available output port with a largest quantity of footprint queues as a target output port; determining a busy degree of a queue on the target output port, and when there is no non-busy queue on the target output port, selecting a footprint queue on the target output port as a target output queue. In the foregoing manners, a network resource is properly used, and network blocking can be effectively alleviated.