An information transmission method, wherein the method comprises: determining, by a base station, to send downlink information to P user equipments of a first type of one or more user equipments of the first and/or a second type within a first time period; generating, by the base station, an indication field according to the determined P user equipments, wherein the indication field comprises M bits, each of the one or more user equipments is corresponding to K bits of the M bits, the K bits are used to indicate whether the corresponding user equipment needs to receive and read the downlink information sent by the base station within the first time period, M is a positive integer greater than 1, K is a positive integer greater than 1 and less than M, and P is an integer greater than or equal to 0; sending, by the base station, on a physical downlink control channel, PDCCH, at a preset time prior to a start time of the first time period, the indication field to the one or more user equipments of the first and/or the second type; and sending, by the base station, the downlink information for the P user equipments within the first time period on the PDCCH; wherein the first time period is a scheduling cycle, the downlink information that needs to be sent is common scheduling information of uplink data or downlink data, and the base station determines, according to a scheduling algorithm, user equipments scheduled within the first time period, and uses the determined user equipments as the user equipment of the first type; or the first time period is a time period after an uplink random access resource, the downlink information that needs to be sent is a random access response packet used to respond to a random access request packet sent by a user equipment, and the base station selects, for access according to uplink resource availability, user equipments corresponding to several random access request packets, and determines that the selected user equipments are the user equipments of the first type. determining, by a base station, to send downlink information to P user equipments of a first type of one or more user equipments of the first and/or a second type within a first time period; generating, by the base station, an indication field according to the determined P user equipments, wherein the indication field comprises M bits, each of the one or more user equipments is corresponding to K bits of the M bits, the K bits are used to indicate whether the corresponding user equipment needs to receive and read the downlink information sent by the base station within the first time period, M is a positive integer greater than 1, K is a positive integer greater than 1 and less than M, and P is an integer greater than or equal to 0; sending, by the base station, on a physical downlink control channel, PDCCH, at a preset time prior to a start time of the first time period, the indication field to the one or more user equipments of the first and/or the second type; and sending, by the base station, the downlink information for the P user equipments within the first time period on the PDCCH; wherein the first time period is a scheduling cycle, the downlink information that needs to be sent is common scheduling information of uplink data or downlink data, and the base station determines, according to a scheduling algorithm, user equipments scheduled within the first time period, and uses the determined user equipments as the user equipment of the first type; or the first time period is a time period after an uplink random access resource, the downlink information that needs to be sent is a random access response packet used to respond to a random access request packet sent by a user equipment, and the base station selects, for access according to uplink resource availability, user equipments corresponding to several random access request packets, and determines that the selected user equipments are the user equipments of the first type.