A paging method, comprising: determining, by a terminal device, that a system frame number, SFN, of a first radio frame is SFN 1 according to SFN 1 mod T=(T/N)×(UE-ID mod N), wherein T is a time length of a discontinuous reception, DRX, cycle, UE-ID is a device identity of the terminal device, and N is a quantity of radio frames that are able to be used for sending the paging message in the DRX cycle of the terminal device; determining, by the terminal device, a paging time interval used for monitoring a paging message according to the first radio frame; and monitoring, by the terminal device, the paging message in the paging time interval, wherein determining, by the terminal device, the paging time interval used for monitoring the paging message according to the first radio frame, comprises: receiving, by the terminal device, first indication information, wherein the first indication information is used for indicating a position of the first radio frame in the paging time interval; and determining, by the terminal device, the paging time interval according to the position of the first radio frame in the paging time interval, wherein the paging time interval is same as a synchronization time interval used for detecting a synchronization signal, characterized in that monitoring, by the terminal device, the paging message in the paging time interval comprises: receiving, by the terminal device, third indication information, wherein the third indication information is used for indicating a third radio frame in the paging time interval; and monitoring, by the terminal device, the paging message on the third radio frame. determining, by a terminal device, that a system frame number, SFN, of a first radio frame is SFN 1 according to SFN 1 mod T=(T/N)×(UE-ID mod N), wherein T is a time length of a discontinuous reception, DRX, cycle, UE-ID is a device identity of the terminal device, and N is a quantity of radio frames that are able to be used for sending the paging message in the DRX cycle of the terminal device; determining, by the terminal device, a paging time interval used for monitoring a paging message according to the first radio frame; and monitoring, by the terminal device, the paging message in the paging time interval, wherein determining, by the terminal device, the paging time interval used for monitoring the paging message according to the first radio frame, comprises: receiving, by the terminal device, first indication information, wherein the first indication information is used for indicating a position of the first radio frame in the paging time interval; and determining, by the terminal device, the paging time interval according to the position of the first radio frame in the paging time interval, wherein the paging time interval is same as a synchronization time interval used for detecting a synchronization signal, characterized in that receiving, by the terminal device, first indication information, wherein the first indication information is used for indicating a position of the first radio frame in the paging time interval; and determining, by the terminal device, the paging time interval according to the position of the first radio frame in the paging time interval, wherein the paging time interval is same as a synchronization time interval used for detecting a synchronization signal, characterized in that monitoring, by the terminal device, the paging message in the paging time interval comprises: receiving, by the terminal device, third indication information, wherein the third indication information is used for indicating a third radio frame in the paging time interval; and monitoring, by the terminal device, the paging message on the third radio frame. receiving, by the terminal device, third indication information, wherein the third indication information is used for indicating a third radio frame in the paging time interval; and monitoring, by the terminal device, the paging message on the third radio frame.