A transmission method for Hybrid Automatic Repeat reQuest, HARQ, feedback information performed by a network device, the method comprising: determining a transmission position of an HARQ-Acknowledgement, ACK, in accordance with a transmission position of downlink transmission and feedback timing of the HARQ-ACK for the downlink transmission, wherein granularity of the feedback timing is smaller than one slot; and receiving the HARQ-ACK at the transmission position of the HARQ-ACK, the method being characterized in that the determining the transmission position of the HARQ-ACK comprises mode A, when the transmission position of the downlink transmission is a slot n, determining the transmission position of the HARQ-ACK as a slot n + ⌈ K 1 / N ⌉, wherein K1 represents a value of the feedback timing of the HARQ-ACK and is an integer, the granularity of the feedback timing is 1/N slot, and N is a predetermined integer greater than 1; or mode B, when the transmission position of the downlink transmission is a slot n, determining the transmission position of the HARQ-ACK as a slot n + ⌊ K 1 / N ⌋, wherein K1 represents a value of the feedback timing of the HARQ-ACK and is an integer, the granularity of the feedback timing is 1/N slot, and N is a predetermined integer greater than 1; or mode C, when the transmission position of the downlink transmission is a slot n, determining the transmission position of the HARQ-ACK as a slot ⌈ n + K 1 ⌉ or n + ⌈ K 1 ⌉, wherein K1 represents a value of the feedback timing of the HARQ-ACK and is an integral multiple of 1/N, the granularity of the feedback timing is 1/N slot, and N is a predetermined integer greater than 1; or mode D, when the transmission position of the downlink transmission is a slot n, determining the transmission position of the HARQ-ACK as a slot ⌊ n + K 1 ⌋ or n + ⌊ K 1 ⌋, wherein K1 represents a value of the feedback timing of the HARQ-ACK and is an integral multiple of 1/N, the granularity of the feedback timing is 1/N slot, and N is a predetermined integer greater than 1; or mode E, when the transmission position of the downlink transmission is a slot n, determining the transmission position of the HARQ-ACK as a mini-slot n ∗ N + K1, wherein K1 represents a value of the feedback timing of the HARQ-ACK and is an integer, wherein N represents the quantity of mini-slots within one slot, and the granularity of the feedback timing is 1/N slot. determining a transmission position of an HARQ-Acknowledgement, ACK, in accordance with a transmission position of downlink transmission and feedback timing of the HARQ-ACK for the downlink transmission, wherein granularity of the feedback timing is smaller than one slot; and receiving the HARQ-ACK at the transmission position of the HARQ-ACK, the method being characterized in that the determining the transmission position of the HARQ-ACK comprises mode A, when the transmission position of the downlink transmission is a slot n, determining the transmission position of the HARQ-ACK as a slot n + ⌈ K 1 / N ⌉, wherein K1 represents a value of the feedback timing of the HARQ-ACK and is an integer, the granularity of the feedback timing is 1/N slot, and N is a predetermined integer greater than 1; or mode B, when the transmission position of the downlink transmission is a slot n, determining the transmission position of the HARQ-ACK as a slot n + ⌊ K 1 / N ⌋, wherein K1 represents a value of the feedback timing of the HARQ-ACK and is an integer, the granularity of the feedback timing is 1/N slot, and N is a predetermined integer greater than 1; or mode C, when the transmission position of the downlink transmission is a slot n, determining the transmission position of the HARQ-ACK as a slot ⌈ n + K 1 ⌉ or n + ⌈ K 1 ⌉, wherein K1 represents a value of the feedback timing of the HARQ-ACK and is an integral multiple of 1/N, the granularity of the feedback timing is 1/N slot, and N is a predetermined integer greater than 1; or mode D, when the transmission position of the downlink transmission is a slot n, determining the transmission position of the HARQ-ACK as a slot ⌊ n + K 1 ⌋ or n + ⌊ K 1 ⌋, wherein K1 represents a value of the feedback timing of the HARQ-ACK and is an integral multiple of 1/N, the granularity of the feedback timing is 1/N slot, and N is a predetermined integer greater than 1; or mode E, when the transmission position of the downlink transmission is a slot n, determining the transmission position of the HARQ-ACK as a mini-slot n ∗ N + K1, wherein K1 represents a value of the feedback timing of the HARQ-ACK and is an integer, wherein N represents the quantity of mini-slots within one slot, and the granularity of the feedback timing is 1/N slot.