A method for data retransmission control for a new radio, NR, system, comprising: receiving (2a02), by a terminal, first downlink data, wherein the first downlink data comprises P Code Block Groups, CBGs, in N CBGs of a preset transport block, P and N are positive integers, and P is less than N; acquiring (2a03), by the terminal, P-bit feedback information through decoding the P CBGs, wherein each bit of the feedback information indicates whether the respective CBG is needed to be retransmitted; and sending (2a04), by the terminal, information for notifying a network-side device to retransmit M CBGs, wherein the M CBGs comprise the CBGs needed to be retransmitted in the N CBGs, M is a positive integer, and M is less than or equal to N; sending, by the terminal, the information comprises: sending, by the terminal, third information, wherein the third information comprises N-bit feedback information, wherein a bitmap correspondence relationship of the N-bit feedback information is the same as a sequence of the N CBGs of the preset transport block, the feedback information at bit positions corresponding to the P CBGs in the N-bit feedback information is the acquired P-bit feedback information, the feedback information in the N-bit feedback information other than the P-bit feedback information is second preset information, and the third information is used for notifying the network-side device to retransmit the CBGs indicated by the acquired P-bit feedback information as being needed to be retransmitted; wherein the second preset information for the remaining N-P feedback information bits is set to positive acknowledgment, ACK. receiving (2a02), by a terminal, first downlink data, wherein the first downlink data comprises P Code Block Groups, CBGs, in N CBGs of a preset transport block, P and N are positive integers, and P is less than N; acquiring (2a03), by the terminal, P-bit feedback information through decoding the P CBGs, wherein each bit of the feedback information indicates whether the respective CBG is needed to be retransmitted; and sending (2a04), by the terminal, information for notifying a network-side device to retransmit M CBGs, wherein the M CBGs comprise the CBGs needed to be retransmitted in the N CBGs, M is a positive integer, and M is less than or equal to N; sending, by the terminal, the information comprises: sending, by the terminal, third information, wherein the third information comprises N-bit feedback information, wherein a bitmap correspondence relationship of the N-bit feedback information is the same as a sequence of the N CBGs of the preset transport block, the feedback information at bit positions corresponding to the P CBGs in the N-bit feedback information is the acquired P-bit feedback information, the feedback information in the N-bit feedback information other than the P-bit feedback information is second preset information, and the third information is used for notifying the network-side device to retransmit the CBGs indicated by the acquired P-bit feedback information as being needed to be retransmitted; wherein the second preset information for the remaining N-P feedback information bits is set to positive acknowledgment, ACK. sending, by the terminal, third information, wherein the third information comprises N-bit feedback information, wherein a bitmap correspondence relationship of the N-bit feedback information is the same as a sequence of the N CBGs of the preset transport block, the feedback information at bit positions corresponding to the P CBGs in the N-bit feedback information is the acquired P-bit feedback information, the feedback information in the N-bit feedback information other than the P-bit feedback information is second preset information, and the third information is used for notifying the network-side device to retransmit the CBGs indicated by the acquired P-bit feedback information as being needed to be retransmitted; wherein the second preset information for the remaining N-P feedback information bits is set to positive acknowledgment, ACK.