A transmission timing information sending method, a transmission timing information receiving method, and an apparatus are provided. The method includes: configuring, by a base station, higher layer signaling, where the higher layer signaling includes at least one transmission timing set used to indicate a transmission timing value, and each of the at least one transmission timing set includes at least one transmission timing value; sending, by the base station, the higher layer signaling to a terminal; determining, by the base station, downlink control information (DCI), where the DCI is used to instruct the terminal to determine a transmission timing value in the at least one transmission timing set, and the determined transmission timing value is a slot that the terminal is instructed to use when sending feedback information; and sending, by the base station, the DCI to the terminal.