A feedback response information sending method, comprising: determining a first bit length, the first bit length being a maximum number of feedback response information bits transmitted through a target uplink channel, the target uplink channel being used for transmitting feedback response information corresponding to at least two Component Carriers, CCs, and the feedback response information comprising Acknowledge/Non-Acknowledge, ACK/NACK, information; when a bit length of feedback response information to be transmitted is larger than the first bit length, compressing feedback response information corresponding to a target CC in the at least two CCs to obtain compressed feedback response information, wherein compressing the feedback response information refers to compressing the feedback response information of downlink data of multiple units into one and the same bit; and sending the compressed feedback response information through the target uplink channel, wherein a bit length of the compressed feedback response information is not larger than the first bit length; characterized in that the target CC comprises: a first CC of which a supported Code Block Group, CBG, quantity reaches a first condition, the first condition comprising that the supported CBG quantity is larger than a first threshold value or the supported CBG quantity is ranked at top n positions of supported CBG quantities, being an integer; or, a second CC of which a comprised downlink transmission resource quantity reaches a second condition, the second condition comprising that the comprised downlink transmission resource quantity is smaller than a second threshold value or the comprised downlink transmission resource quantity is ranked at last m positions of comprised downlink transmission resource quantities, n being an integer; when the target CC comprises the first CC of which the supported CBG quantity reaches the first condition, the method further comprises: determining at least one first CC as the target CC according to a descending sequence of supported CBG quantities of first CCs; when the target CC comprises the second CC of which the comprised downlink transmission resource quantity reaches the second condition, the method further comprises: determining at least one second CC as the target CC according to an ascending sequence of comprised downlink transmission resource quantities of second CCs. determining a first bit length, the first bit length being a maximum number of feedback response information bits transmitted through a target uplink channel, the target uplink channel being used for transmitting feedback response information corresponding to at least two Component Carriers, CCs, and the feedback response information comprising Acknowledge/Non-Acknowledge, ACK/NACK, information; when a bit length of feedback response information to be transmitted is larger than the first bit length, compressing feedback response information corresponding to a target CC in the at least two CCs to obtain compressed feedback response information, wherein compressing the feedback response information refers to compressing the feedback response information of downlink data of multiple units into one and the same bit; and sending the compressed feedback response information through the target uplink channel, wherein a bit length of the compressed feedback response information is not larger than the first bit length; characterized in that the target CC comprises: a first CC of which a supported Code Block Group, CBG, quantity reaches a first condition, the first condition comprising that the supported CBG quantity is larger than a first threshold value or the supported CBG quantity is ranked at top n positions of supported CBG quantities, being an integer; or, a second CC of which a comprised downlink transmission resource quantity reaches a second condition, the second condition comprising that the comprised downlink transmission resource quantity is smaller than a second threshold value or the comprised downlink transmission resource quantity is ranked at last m positions of comprised downlink transmission resource quantities, n being an integer; when the target CC comprises the first CC of which the supported CBG quantity reaches the first condition, the method further comprises: determining at least one first CC as the target CC according to a descending sequence of supported CBG quantities of first CCs; when the target CC comprises the second CC of which the comprised downlink transmission resource quantity reaches the second condition, the method further comprises: determining at least one second CC as the target CC according to an ascending sequence of comprised downlink transmission resource quantities of second CCs.