A method for information transmission, comprising: acquiring, by a terminal device, a first sequence number from sequence indication information sent by a network device; determining, by the terminal device, feedback information for downlink data sent by the network device; determining, by the terminal device, a first offset value based on a mapping relationship between multiple offset values and multiple types of feedback information, wherein the first offset value is one of the multiple offset values, a type of the feedback information used for the downlink data is one of the multiple types of feedback information, and the first offset value is determined based on a mapping relationship between the first offset value and the type of the feedback information used for the downlink data; determining,, by the terminal device, a second sequence number based on the first offset value and the first sequence number, and determining a second sequence based on the second sequence number; sending, by the terminal device, the second sequence to the network device, the second sequence carrying the feedback information for the downlink data; characterized in that the second sequence number is determined based on a sum of the first offset value and the first sequence number; an amount of the multiple types of feedback information is 2 or 4; when the amount of the multiple types of feedback information is 4, the multiple types of feedback information comprises: acknowledgement, ACK, and ACK; ACK and negative acknowledgement, NACK; NACK and ACK; and NACK and NACK; and when the amount of the multiple types of feedback information is 2, the multiple types of feedback information comprises: ACK; and NACK. acquiring, by a terminal device, a first sequence number from sequence indication information sent by a network device; determining, by the terminal device, feedback information for downlink data sent by the network device; determining, by the terminal device, a first offset value based on a mapping relationship between multiple offset values and multiple types of feedback information, wherein the first offset value is one of the multiple offset values, a type of the feedback information used for the downlink data is one of the multiple types of feedback information, and the first offset value is determined based on a mapping relationship between the first offset value and the type of the feedback information used for the downlink data; determining,, by the terminal device, a second sequence number based on the first offset value and the first sequence number, and determining a second sequence based on the second sequence number; sending, by the terminal device, the second sequence to the network device, the second sequence carrying the feedback information for the downlink data; characterized in that the second sequence number is determined based on a sum of the first offset value and the first sequence number; an amount of the multiple types of feedback information is 2 or 4; when the amount of the multiple types of feedback information is 4, the multiple types of feedback information comprises: acknowledgement, ACK, and ACK; ACK and negative acknowledgement, NACK; NACK and ACK; and NACK and NACK; and when the amount of the multiple types of feedback information is 2, the multiple types of feedback information comprises: ACK; and NACK. acknowledgement, ACK, and ACK; ACK and negative acknowledgement, NACK; NACK and ACK; and NACK and NACK; and when the amount of the multiple types of feedback information is 2, the multiple types of feedback information comprises: ACK; and NACK. ACK; and NACK.