A data transmission method, comprising: generating, by user equipment, at least one piece of channel state information, wherein each piece of channel state information in the at least one piece of channel state information is corresponding to at least two resource units required for sending data by a base station, wherein a resource unit is a minimum time unit of a resource used for sending data by the base station; and sending, by the user equipment, the at least one piece of channel state information to the base station, wherein the at least one piece of channel state information is reference information used for sending data by the base station on the at least one resource unit corresponding to the at least one piece of channel state information; wherein the generating the at least one piece of channel state information further comprises determining, according to signal strength of signals, including a wanted signal and an interference signal, sent by the base station on all resource units, resource units on which the base station sends data with similar interference, the at least two resource units corresponding to the at least one piece of channel state information suffering similar interference, wherein interference is similar when signal strength of interference signals is approximately the same; and wherein the method further comprises: sending, by the user equipment, feedback mode indication information to the base station, wherein the feedback mode indication information is used to indicate that a mode in which the user equipment sends channel state information is a first feedback mode or a second feedback mode; and the at least one piece of channel state information is corresponding to the at least two resource units when the feedback mode indication information indicates the first feedback mode; and the channel state information sent by the user equipment to the base station is information about an entire channel between the user equipment and the base station when the feedback mode indication information indicates the second feedback mode. generating, by user equipment, at least one piece of channel state information, wherein each piece of channel state information in the at least one piece of channel state information is corresponding to at least two resource units required for sending data by a base station, wherein a resource unit is a minimum time unit of a resource used for sending data by the base station; and sending, by the user equipment, the at least one piece of channel state information to the base station, wherein the at least one piece of channel state information is reference information used for sending data by the base station on the at least one resource unit corresponding to the at least one piece of channel state information; wherein the generating the at least one piece of channel state information further comprises determining, according to signal strength of signals, including a wanted signal and an interference signal, sent by the base station on all resource units, resource units on which the base station sends data with similar interference, the at least two resource units corresponding to the at least one piece of channel state information suffering similar interference, wherein interference is similar when signal strength of interference signals is approximately the same; and wherein the method further comprises: sending, by the user equipment, feedback mode indication information to the base station, wherein the feedback mode indication information is used to indicate that a mode in which the user equipment sends channel state information is a first feedback mode or a second feedback mode; and the at least one piece of channel state information is corresponding to the at least two resource units when the feedback mode indication information indicates the first feedback mode; and the channel state information sent by the user equipment to the base station is information about an entire channel between the user equipment and the base station when the feedback mode indication information indicates the second feedback mode. sending, by the user equipment, feedback mode indication information to the base station, wherein the feedback mode indication information is used to indicate that a mode in which the user equipment sends channel state information is a first feedback mode or a second feedback mode; and the at least one piece of channel state information is corresponding to the at least two resource units when the feedback mode indication information indicates the first feedback mode; and the channel state information sent by the user equipment to the base station is information about an entire channel between the user equipment and the base station when the feedback mode indication information indicates the second feedback mode.