A data communication method, comprising: sending a first group of one or more control resource sets to a user equipment; sending a second group of one or more control resource sets to the user equipment; sending a downlink control signaling to the user equipment, wherein the downlink control signaling is used to instruct the user equipment to receive data on a time-frequency resource for data transmission, the downlink control signaling comprises a first instruction and a second instruction, the first instruction is used to indicate the time-frequency resource for data transmission, and the second instruction is used to indicate whether a time-frequency resource corresponding to the second group of control resource sets is reused for data transmission, wherein sending the downlink control signaling to the user equipment comprises: determining whether the time-frequency resource corresponding to the second group of control resource sets is used for data transmission; when it is determined that the time-frequency resource corresponding to the second group of control resource sets is not used for data transmission, mapping, on the first group of control resource sets, the downlink control signaling sent to the user equipment, and setting the second instruction as that the time-frequency resource corresponding to the second group of control resource sets is not used for data transmission; or when it is determined that the time-frequency resource corresponding to the second group of control resource sets is used for data transmission, mapping, on the first group of control resource sets, the downlink control signaling sent to the user equipment, setting the second instruction as that the time-frequency resource corresponding to the second group of control resource sets is used for data transmission, and mapping the data on the second group of control resource sets. sending a first group of one or more control resource sets to a user equipment; sending a second group of one or more control resource sets to the user equipment; sending a downlink control signaling to the user equipment, wherein the downlink control signaling is used to instruct the user equipment to receive data on a time-frequency resource for data transmission, the downlink control signaling comprises a first instruction and a second instruction, the first instruction is used to indicate the time-frequency resource for data transmission, and the second instruction is used to indicate whether a time-frequency resource corresponding to the second group of control resource sets is reused for data transmission, wherein sending the downlink control signaling to the user equipment comprises: determining whether the time-frequency resource corresponding to the second group of control resource sets is used for data transmission; when it is determined that the time-frequency resource corresponding to the second group of control resource sets is not used for data transmission, mapping, on the first group of control resource sets, the downlink control signaling sent to the user equipment, and setting the second instruction as that the time-frequency resource corresponding to the second group of control resource sets is not used for data transmission; or when it is determined that the time-frequency resource corresponding to the second group of control resource sets is used for data transmission, mapping, on the first group of control resource sets, the downlink control signaling sent to the user equipment, setting the second instruction as that the time-frequency resource corresponding to the second group of control resource sets is used for data transmission, and mapping the data on the second group of control resource sets. determining whether the time-frequency resource corresponding to the second group of control resource sets is used for data transmission; when it is determined that the time-frequency resource corresponding to the second group of control resource sets is not used for data transmission, mapping, on the first group of control resource sets, the downlink control signaling sent to the user equipment, and setting the second instruction as that the time-frequency resource corresponding to the second group of control resource sets is not used for data transmission; or when it is determined that the time-frequency resource corresponding to the second group of control resource sets is used for data transmission, mapping, on the first group of control resource sets, the downlink control signaling sent to the user equipment, setting the second instruction as that the time-frequency resource corresponding to the second group of control resource sets is used for data transmission, and mapping the data on the second group of control resource sets.