Provided in the present disclosure are a method and device for transmitting a downlink channel. The method for transmitting a downlink channel includes: notifying a UE of a resource set for transmission of a group common PDCCH. The solution of the present disclosure enables the UE to ascertain a resource location for detection and reception of a group common PDCCH, thereby detecting and receiving the group common PDCCH at the resource location of the group common PDCCH.