A cell reselection method performed by a radio access network device, the method comprising: • generating (S 301) cell reselection information, wherein the cell reselection information comprises: o a correspondence between identifiers of at least one carrier frequency and identifiers of a plurality of different network slices, wherein: ▪ for each carrier frequency among the at least one carrier frequency, an identifier of the carrier frequency among the identifiers of the at least one carrier frequency corresponds to an identifier of each network slice among at least one network slice among the plurality of different network slices, the carrier frequency supporting the at least one network slice among the plurality of different network slices, wherein the plurality of different network slices are supported by a terminal device, and o an identifier of a first network slice, among the plurality of different network slices, that causes an RRC connection of the terminal device to be released or rejected; • adding the cell reselection information to a radio resource control, RRC, message, the RRC message being a RRC connection release message or a RRC connection reject message; • sending (S 302) the RRC message to the terminal device, wherein the cell reselection information is used by the terminal device to perform a cell reselection. • generating (S 301) cell reselection information, wherein the cell reselection information comprises: o a correspondence between identifiers of at least one carrier frequency and identifiers of a plurality of different network slices, wherein: ▪ for each carrier frequency among the at least one carrier frequency, an identifier of the carrier frequency among the identifiers of the at least one carrier frequency corresponds to an identifier of each network slice among at least one network slice among the plurality of different network slices, the carrier frequency supporting the at least one network slice among the plurality of different network slices, wherein the plurality of different network slices are supported by a terminal device, and o an identifier of a first network slice, among the plurality of different network slices, that causes an RRC connection of the terminal device to be released or rejected; o a correspondence between identifiers of at least one carrier frequency and identifiers of a plurality of different network slices, wherein: ▪ for each carrier frequency among the at least one carrier frequency, an identifier of the carrier frequency among the identifiers of the at least one carrier frequency corresponds to an identifier of each network slice among at least one network slice among the plurality of different network slices, the carrier frequency supporting the at least one network slice among the plurality of different network slices, wherein the plurality of different network slices are supported by a terminal device, and ▪ for each carrier frequency among the at least one carrier frequency, an identifier of the carrier frequency among the identifiers of the at least one carrier frequency corresponds to an identifier of each network slice among at least one network slice among the plurality of different network slices, the carrier frequency supporting the at least one network slice among the plurality of different network slices, wherein the plurality of different network slices are supported by a terminal device, and o an identifier of a first network slice, among the plurality of different network slices, that causes an RRC connection of the terminal device to be released or rejected; • adding the cell reselection information to a radio resource control, RRC, message, the RRC message being a RRC connection release message or a RRC connection reject message; • sending (S 302) the RRC message to the terminal device, wherein the cell reselection information is used by the terminal device to perform a cell reselection.