An information transmission method, wherein the method is applied to a network device and comprises: determining cyclic redundancy check, CRC, bits of to-be-sent information bits; concatenating the CRC bits and the to-be-sent information bits to obtain a first information sequence; interleaving bits in the first information sequence in an interleaving manner, to obtain a second information sequence, wherein the interleaving manner is used to ensure that bits at locations of the CRC bits after a cyclic shift cannot check bits at locations of the to-be-sent information bits after the cyclic shift; performing the cyclic shift on the second information sequence to obtain a third information sequence, wherein a quantity of cyclically shifted bits is used to carry information about some bits of a system frame number; and sending the third information sequence, wherein the to-be-sent information bits comprise reserved bits; and the interleaving bits in the first information sequence in an interleaving manner to obtain a second information sequence comprises: exchanging a bit at a first bit location with a bit at a second bit location to obtain a fourth information sequence, wherein the first bit location is a first location in the first information sequence, the second bit location is any bit location of the reserved bits, and a bit that is at the first bit location and that is obtained after interleaving is 1; and determining the fourth information sequence as the second information sequence. determining cyclic redundancy check, CRC, bits of to-be-sent information bits; concatenating the CRC bits and the to-be-sent information bits to obtain a first information sequence; interleaving bits in the first information sequence in an interleaving manner, to obtain a second information sequence, wherein the interleaving manner is used to ensure that bits at locations of the CRC bits after a cyclic shift cannot check bits at locations of the to-be-sent information bits after the cyclic shift; performing the cyclic shift on the second information sequence to obtain a third information sequence, wherein a quantity of cyclically shifted bits is used to carry information about some bits of a system frame number; and sending the third information sequence, wherein the to-be-sent information bits comprise reserved bits; and the interleaving bits in the first information sequence in an interleaving manner to obtain a second information sequence comprises: exchanging a bit at a first bit location with a bit at a second bit location to obtain a fourth information sequence, wherein the first bit location is a first location in the first information sequence, the second bit location is any bit location of the reserved bits, and a bit that is at the first bit location and that is obtained after interleaving is 1; and determining the fourth information sequence as the second information sequence. exchanging a bit at a first bit location with a bit at a second bit location to obtain a fourth information sequence, wherein the first bit location is a first location in the first information sequence, the second bit location is any bit location of the reserved bits, and a bit that is at the first bit location and that is obtained after interleaving is 1; and determining the fourth information sequence as the second information sequence.