Routing table updating method, evpn control device, and evpn system

A routing table updating method, an EVPN control device, and an EVPN system relate to the field of communications, and can reduce resource expenditure when a PE device updates a routing table. A specific scheme is that: a control device acquires PE device parameters of an EVPN, the PE device parameters being used for indicating a connection relationship between at least two PE devices; the control device acquires a local network terminal identifier of each PE device of the at least two PE devices; and the control device determines topology of the EVPN according to the PE device parameters, and determines an EVPN routing table of each PE device of the at least two PE devices according to the topology of the EVPN and the local network terminal identifier of each PE device of the at least two PE devices, and the control device sends the EVPN routing table of each PE device of the at least two PE devices to the corresponding PE device.