A data transmission method, characterized by comprising: generating first indication information, by a network device, and sending, by the network device, a terminal device the first indication information by using a Radio Resource Control signaling, wherein the first indication information is used for indicating the terminal device to send multiple pieces of uplink information on multiple uplink channels in a time division multiplexing mode or the first indication information is used for indicating the terminal device to send the multiple pieces of uplink information on a first uplink channel of the multiple uplink channels, wherein the multiple pieces of uplink information correspond to links of multiple downlinks; and sending, by the network device, an uplink grant message to the terminal device by using Downlink Control Information; and receiving, by the network device, the multiple pieces of uplink information sent by the terminal device, comprising: when the first indication information is used for indicating the terminal device to send the multiple pieces of uplink information on the first uplink channel of the multiple uplink channels, receiving the multiple pieces of uplink information sent by the terminal device on a Physical Uplink Control Channel (PUCCH), wherein the multiple pieces of uplink information comprise acknowledgement/non-acknowledgement information corresponding to each downlink in the multiple downlinks, or when the first indication information is used for indicating the terminal device to send the multiple pieces of uplink information on the first uplink channel of the multiple uplink channels, receiving the multiple pieces of uplink information sent by the terminal device on a Physical Uplink Shared Channel (PUSCH), wherein the multiple pieces of uplink information comprise the uplink data and the acknowledgement/non-acknowledgement information corresponding to each downlink in the multiple downlinks. generating first indication information, by a network device, and sending, by the network device, a terminal device the first indication information by using a Radio Resource Control signaling, wherein the first indication information is used for indicating the terminal device to send multiple pieces of uplink information on multiple uplink channels in a time division multiplexing mode or the first indication information is used for indicating the terminal device to send the multiple pieces of uplink information on a first uplink channel of the multiple uplink channels, wherein the multiple pieces of uplink information correspond to links of multiple downlinks; and sending, by the network device, an uplink grant message to the terminal device by using Downlink Control Information; and receiving, by the network device, the multiple pieces of uplink information sent by the terminal device, comprising: when the first indication information is used for indicating the terminal device to send the multiple pieces of uplink information on the first uplink channel of the multiple uplink channels, receiving the multiple pieces of uplink information sent by the terminal device on a Physical Uplink Control Channel (PUCCH), wherein the multiple pieces of uplink information comprise acknowledgement/non-acknowledgement information corresponding to each downlink in the multiple downlinks, or when the first indication information is used for indicating the terminal device to send the multiple pieces of uplink information on the first uplink channel of the multiple uplink channels, receiving the multiple pieces of uplink information sent by the terminal device on a Physical Uplink Shared Channel (PUSCH), wherein the multiple pieces of uplink information comprise the uplink data and the acknowledgement/non-acknowledgement information corresponding to each downlink in the multiple downlinks. when the first indication information is used for indicating the terminal device to send the multiple pieces of uplink information on the first uplink channel of the multiple uplink channels, receiving the multiple pieces of uplink information sent by the terminal device on a Physical Uplink Control Channel (PUCCH), wherein the multiple pieces of uplink information comprise acknowledgement/non-acknowledgement information corresponding to each downlink in the multiple downlinks, or when the first indication information is used for indicating the terminal device to send the multiple pieces of uplink information on the first uplink channel of the multiple uplink channels, receiving the multiple pieces of uplink information sent by the terminal device on a Physical Uplink Shared Channel (PUSCH), wherein the multiple pieces of uplink information comprise the uplink data and the acknowledgement/non-acknowledgement information corresponding to each downlink in the multiple downlinks.