Link discovery method and link discovery device based on Opendaylight framework

The invention discloses a link discovery method and device based on an Opendaylight framework. The method comprises the following steps that network equipment announces link information to neighbor network equipment through an LLDP protocol; the neighbor network equipment announces link information to the network equipment; the network management platform obtains link information of the network equipment and the neighbor network equipment through an Opendaylight southbound interface; and whether the link from the network device to the neighbor network device and the link from the neighbor network device to the network device are the same link is determined. The link information of the network equipment is read through the southbound interface; the southbound interface not only supports a modularization mode and can be flexibly upgraded and uninstalled, but also supports a plurality of protocols. A network management platform adopting an Opendaylight southbound interface is provided with a modular framework, a