A packet sending method in distributed router networking, a device, and a system are disclosed, and relate to the field of network communication technologies. The distributed router networking includes at least two routers, the at least two routers are located in a same local area network, and each router has a capability of communicating with an external network. After receiving a packet, any router in the local area network may distribute the packet to the plurality of routers in the local area network according to a packet load balancing rule, and the plurality of routers distribute the packet to the external network.