Disclosed are a method and device in a UE and a base station supporting low-delay radio communication in radio communication. As an embodiment, the UE receives first signaling in step 1, the first signaling scheduling sending of N transmission block groups; the UE receives the N transmission block groups in step 2, the N transmission block groups being sent in N LTE time slots respectively; and the UE sends N uplink signals in N sub-resource groups respectively in step 3, the N uplink signaling respectively indicating whether transmission blocks in the N transmission block groups are correctly received. The first signaling is physical layer signaling, and N is a positive integer. Each of the transmission block groups comprises G transmission blocks, and G is a positive integer. Each of the sub-resource groups comprises J sub-resources, a format of each of the sub-resources is a part, within an LTE time slot, of a PUCCH format {1, 1a, 1b}, and J is 1 or 2. The present invention can reduce the network time delay, and can keep compatible with an existing LTE device to the greatest extent.