A terminal device determines a physical resource block PRB position of a resource corresponding to a physical uplink control channel PUCCH; and the terminal device sends the PUCCH based on the PRB position, wherein the PRB position satisfies RBBWPoffset+└rPUCCH/NCS┘ or NBWPsize−1−RBBWPoffset−└rPUCCH/NCS┘, rPUCCH is a PUCCH resource index, NCS is a quantity of cyclic shifts of a common PUCCH resource set, RBBWPoffset is a frequency domain offset value of the common PUCCH resource set, and NBWPSize is a size of a bandwidth part configured with a PUCCH resource.