The invention provides communication methods under centralized unit-distributed unit architecture, communication equipment and a chip. The method includes the following steps: a centralized unit control plane entity (CU-CP) of an access network receives interface establishing request messages from a centralized unit user plane entity (CU-UP) of the access network, and the interface establishing request messages carry network slice information supported by the CU-UP; the CU-CP sends interface establishing response messages to the CU-UP after receiving the interface establishing request messages; the network slice information supported by the CU-UP includes identification of a tracking area serviced by the CU-UP and network slice identification corresponding to the tracking area, or the identification of a district serviced by the CU-UP and the network slice identification corresponding to the district, or the identification of a public land mobile network serviced by the CU-UP and the network slice identification corresponding to the public land mobile network; and the interface establishing response messages also carry network slice capability information supported by the CU-UP.