Embodiments of the invention provide a flow forwarding method and a flow forwarding device for a switching system. The switching system comprises a first LCC, at least one second LCC and a third LCC which are interconnected according to a mesh topology. The method comprises the steps as follows: the first LCC receives a data packet and parses the data packet to acquire the destination address of the data packet; and when the destination address indicates that the data packet is to be sent to the third LCC, the first LCC carries the data packet on a third link and forwards the data packet to the third LCC if the current preset configuration mode of the switching system is a first configuration mode, wherein the first configuration mode indicates that the switching system is currently in an N-jump mode, and N is a natural number greater than or equal to 3. By adopting the method provided by the embodiment of the invention, wire-speed forwarding of a data packet between any two nodes in the switching system is realized, the expansion ability of the switching system is enhanced, and the expansion cost of the switching system is reduced.