Method and device for establishing link between virtual network functions

The invention discloses a method and device for establishing a link between virtual network functions to solve the problem that a link between VNFs cannot be automatically established. The method comprises the steps that an NFVO obtains an IP address and identification information of a CP of a first VNF; the NFVO determines the identification information, corresponding to the CP identification information of the first VNF, of the second VNF according to the link information between the VNFs; the link information comprises the corresponding relation of CP identification information of all the VNFs and the corresponding relation of the identification information of all the CPs and the identification information of all the VNFs; the NFVO sends the IP address and the identification information of the CP of the first VNF to the second VNF corresponding to the identification information of the second VNF, and the second VNF starts to establish a link connecting procedure between the CP of the second VNF and the CP of the first VNF according to the IP address of the CP of the first VNF.