An information sending method, comprising: a) generating (S206, S202), based on N symbol sequences that are in a first modulation scheme and that are respectively corresponding to N users, N symbol sequences that are in a second modulation scheme and that are respectively corresponding to the N users, wherein N is an integer greater than 1, each symbol sequence in the second modulation scheme comprises information about the N symbol sequences in the first modulation scheme, and the second modulation scheme is a higher order modulation scheme than the first modulation scheme; and b) separately sending the N symbol sequences in the second modulation scheme to the N users by using resource blocks that are respectively corresponding to the N users; and c) wherein processing of the generating, based on N symbol sequences that are in a first modulation scheme, N symbol sequences that are in a second modulation scheme comprises: c1) generating N modulation symbols that are in the second modulation scheme and that are respectively corresponding to the N users by mixing k th modulation symbols in all symbol sequences in the first modulation scheme, wherein c2) k is an integer greater than 0 and less than or equal to M, and M is a quantity of the modulation symbols in all symbol sequences in the first modulation scheme, and each of the N modulation symbols in the second modulation scheme comprises information about the k th modulation symbol in each symbol sequence in the first modulation scheme, and the N modulation symbols in the second modulation scheme are respectively the k th modulation symbols in the N symbol sequences in the second modulation scheme. a) generating (S206, S202), based on N symbol sequences that are in a first modulation scheme and that are respectively corresponding to N users, N symbol sequences that are in a second modulation scheme and that are respectively corresponding to the N users, wherein N is an integer greater than 1, each symbol sequence in the second modulation scheme comprises information about the N symbol sequences in the first modulation scheme, and the second modulation scheme is a higher order modulation scheme than the first modulation scheme; and b) separately sending the N symbol sequences in the second modulation scheme to the N users by using resource blocks that are respectively corresponding to the N users; and c) wherein processing of the generating, based on N symbol sequences that are in a first modulation scheme, N symbol sequences that are in a second modulation scheme comprises: c1) generating N modulation symbols that are in the second modulation scheme and that are respectively corresponding to the N users by mixing k th modulation symbols in all symbol sequences in the first modulation scheme, wherein c2) k is an integer greater than 0 and less than or equal to M, and M is a quantity of the modulation symbols in all symbol sequences in the first modulation scheme, and each of the N modulation symbols in the second modulation scheme comprises information about the k th modulation symbol in each symbol sequence in the first modulation scheme, and the N modulation symbols in the second modulation scheme are respectively the k th modulation symbols in the N symbol sequences in the second modulation scheme. c1) generating N modulation symbols that are in the second modulation scheme and that are respectively corresponding to the N users by mixing k th modulation symbols in all symbol sequences in the first modulation scheme, wherein c2) k is an integer greater than 0 and less than or equal to M, and M is a quantity of the modulation symbols in all symbol sequences in the first modulation scheme, and each of the N modulation symbols in the second modulation scheme comprises information about the k th modulation symbol in each symbol sequence in the first modulation scheme, and the N modulation symbols in the second modulation scheme are respectively the k th modulation symbols in the N symbol sequences in the second modulation scheme.