A control information feedback method, comprising: receiving (S100, S202, S302, S402, S500), by the UE, an uplink grant, UL Grant, in a subframe n, wherein the UL Grant is used to indicate physical uplink shared channel, PUSCH, transmission in a subframe n + k', n is an integer, and k' is an uplink association index and is determined according to an uplink reference configuration; determining (S101, S203, S303, S403, S501), by the UE, hybrid automatic repeat request acknowledgment, HARQ-ACK, information according to a downlink reference configuration, wherein the downlink reference configuration is used to determine a downlink association set { k 0, k 1,..., k M c -1}, wherein Mc is a natural number greater than or equal to 1, and the HARQ-ACK information is carried on the PUSCH; and transmitting (S102, S204, S305, S404, S502), by the UE, the PUSCH in the subframe n + k'; wherein the UE is configured with a dynamic time division duplexing, TDD, uplink-downlink configuration, and the uplink reference configuration is different from the downlink reference configuration, wherein the downlink reference configuration is uplink-downlink configuration 5, uplink-downlink configuration 2 or uplink-downlink configuration 4, and the uplink reference configuration is uplink-downlink configuration 0, uplink-downlink configuration 1 or uplink-downlink configuration 6; wherein before determining, by the UE, HARQ-ACK information according to a downlink reference configuration, the method further comprises: determining, by the UE, an HARQ-ACK feedback mode, wherein the HARQ-ACK feedback mode does not include HARQ-ACK bundling; wherein the HARQ-ACK feedback mode determined by the UE is physical uplink control channel, PUCCH, format 1b with channel selection or PUCCH format 3; wherein the determining HARQ-ACK information according to a downlink reference configuration comprises: determining the downlink association set { k 0, k 1,..., k M c -1} of the subframe n + k' according to the downlink reference configuration; and determining the HARQ-ACK information according to the downlink association set { k 0, k 1,..., k M c -1}. receiving (S100, S202, S302, S402, S500), by the UE, an uplink grant, UL Grant, in a subframe n, wherein the UL Grant is used to indicate physical uplink shared channel, PUSCH, transmission in a subframe n + k', n is an integer, and k' is an uplink association index and is determined according to an uplink reference configuration; determining (S101, S203, S303, S403, S501), by the UE, hybrid automatic repeat request acknowledgment, HARQ-ACK, information according to a downlink reference configuration, wherein the downlink reference configuration is used to determine a downlink association set { k 0, k 1,..., k M c -1}, wherein Mc is a natural number greater than or equal to 1, and the HARQ-ACK information is carried on the PUSCH; and transmitting (S102, S204, S305, S404, S502), by the UE, the PUSCH in the subframe n + k'; wherein the UE is configured with a dynamic time division duplexing, TDD, uplink-downlink configuration, and the uplink reference configuration is different from the downlink reference configuration, wherein the downlink reference configuration is uplink-downlink configuration 5, uplink-downlink configuration 2 or uplink-downlink configuration 4, and the uplink reference configuration is uplink-downlink configuration 0, uplink-downlink configuration 1 or uplink-downlink configuration 6; wherein before determining, by the UE, HARQ-ACK information according to a downlink reference configuration, the method further comprises: determining, by the UE, an HARQ-ACK feedback mode, wherein the HARQ-ACK feedback mode does not include HARQ-ACK bundling; wherein the HARQ-ACK feedback mode determined by the UE is physical uplink control channel, PUCCH, format 1b with channel selection or PUCCH format 3; wherein the determining HARQ-ACK information according to a downlink reference configuration comprises: determining the downlink association set { k 0, k 1,..., k M c -1} of the subframe n + k' according to the downlink reference configuration; and determining the HARQ-ACK information according to the downlink association set { k 0, k 1,..., k M c -1}. determining, by the UE, an HARQ-ACK feedback mode, wherein the HARQ-ACK feedback mode does not include HARQ-ACK bundling; wherein the HARQ-ACK feedback mode determined by the UE is physical uplink control channel, PUCCH, format 1b with channel selection or PUCCH format 3; wherein the determining HARQ-ACK information according to a downlink reference configuration comprises: determining the downlink association set { k 0, k 1,..., k M c -1} of the subframe n + k' according to the downlink reference configuration; and determining the HARQ-ACK information according to the downlink association set { k 0, k 1,..., k M c -1}. determining the downlink association set { k 0, k 1,..., k M c -1} of the subframe n + k' according to the downlink reference configuration; and determining the HARQ-ACK information according to the downlink association set { k 0, k 1,..., k M c -1}.