A path establishment method and device, and a network node are provided. The method includes: on a first node in a path from an ingress node to an egress node, a label of a host Forwarding Equivalence Class (FEC) of the egress node is taken as the label of a parasitic FEC of the egress node, and a Multiprotocol Label Switching (MPLS) based Label Switched Path (LSP) corresponding to the parasitic FEC is established. The label is an incoming label, or an outgoing label, or a combination of an incoming label and an outgoing label.