A method, apparatus and system for transmitting paging information. The method includes: calculating, by a first communication node, a time domain position of a paging occasion (PO) of a second communication node; and transmitting, by the first communication node, paging information to the second communication node within the PO corresponding to the time domain position, where the paging information includes at least one of: paging downlink control information and a paging message, and the PO includes a group of paging resources for transmitting paging information on one or more preset beams or ports.