The present disclosure provides a wireless network function configuration method, a wireless network node, and a core network device, that reduce a requirement on a bandwidth of a transport network. The method includes: determining, by a first wireless network node, a function configuration policy that is used by the first wireless network node and a second wireless network node to perform wireless network function configuration; and sending, by the first wireless network node and to the second wireless network node, function configuration information corresponding to the second part of wireless network functions, wherein the function configuration information is used by the second wireless network node to complete function configuration of the second wireless network node.