Downlink control method and device

The invention discloses a downlink control method and device. The method comprises the steps that a base station determines at least one downlink control channel from a first downlink control channel and a second downlink control channel, wherein it is determined that the second downlink control channel is employed in a short transmission time interval TTI out of a scheduling range of the first downlink control channel or the downlink control channel employed in the short TTI is determined according to predefined information or system configuration information; and the base station sends downlink control information DCI by employing the determined downlink control channel. According to the method and the device, the downlink control channel employing problem in the short TTI containing relatively few OFDM (Orthogonal Frequency Division Multiplexing) symbols can be solved, and a low time delay communication demand is ensured.