A communication method is provided, including: obtaining a to-be-segmented first bit sequence, where a quantity of bits in the first bit sequence is B, and a quantity of bits that can be carried by a physical resource corresponding to the first bit sequence is N1; determining, based on N1 and a parameter L, a quantity C of bit sequences obtained by segmenting the first bit sequence, where a value of L is equal to (B+B1)/Rmin,Kmax, Rmin,Kmax is a minimum bit rate corresponding to an available maximum code block length Kmax, and B1 is an integer greater than or equal to 0; and segmenting the first bit sequence into C segmented bit sequences. Based on the method, a proper code block segmentation scheme can be provided.