An information transmission method and a related device are provided. The method includes: determining, by a base station, to send downlink information to P user equipments of at least one user equipment within a first time period; generating, by the base station, an indication field according to the determined P user equipments, where the indication field includes M bits, each of the at least one user equipment 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, K is a positive integer greater than 1 and less than M, and P is an integer greater than or equal to 0; and sending, by the base station, the indication field to the at least one user equipment.