A method for transmitting Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) feedback information is provided. The method includes obtaining HARQ-ACK feedback information, a total number of bits of which is less than or equal to four through performing group bundling on the HARQ-ACK feedback information of all sub-frames in a current HARQ-ACK bundling window of two Component Carriers (CCs), determining a number of Physical Uplink Control Channel (PUCCH) resources provided for transmission of the HARQ-ACK feedback information according to data transmission modes of the two CCs, and a number of elements in the bundling window, and transmitting the HARQ-ACK feedback information after the group bundling to a base station on PUCCH channel resources adopting a PUCCH format 1b of channel selection according to the PUCCH channel resources mapped from the HARQ-ACK feedback information after the group bundling and modulation symbols.