An uplink information sending method, comprising: receiving, by a terminal device, common control information sent by a base station device in a first downlink transmission time interval; wherein the common control information is used to indicate a grantless time domain resource which is used for grantless transmission by the terminal device, determining, by the terminal device, the grantless time domain resource based on the common control information, wherein the grantless time domain resource comprises at least one consecutive uplink transmission time interval, a start time unit of the grantless time domain resource is later than the first downlink transmission time interval, and the start time unit is a first uplink transmission time interval of the at least one consecutive uplink transmission time interval; and sending (S 104), by the terminal device, data information on an uplink data channel, wherein the uplink data channel corresponds to the at least one consecutive uplink transmission time interval in the grantless time domain resource, wherein the determining, by the terminal device, the grantless time domain resource based on the common control information comprises: determining, by the terminal device, the start time unit based on the common control information; wherein the start time unit is a first transmission time interval that follows a target transmission time interval, the target transmission time interval is a last transmission time interval of a downlink burst carrying the common control information, the downlink burst comprises at least one consecutive downlink transmission time interval in which the base station occupies a channel to perform sending. receiving, by a terminal device, common control information sent by a base station device in a first downlink transmission time interval; wherein the common control information is used to indicate a grantless time domain resource which is used for grantless transmission by the terminal device, determining, by the terminal device, the grantless time domain resource based on the common control information, wherein the grantless time domain resource comprises at least one consecutive uplink transmission time interval, a start time unit of the grantless time domain resource is later than the first downlink transmission time interval, and the start time unit is a first uplink transmission time interval of the at least one consecutive uplink transmission time interval; and sending (S 104), by the terminal device, data information on an uplink data channel, wherein the uplink data channel corresponds to the at least one consecutive uplink transmission time interval in the grantless time domain resource, wherein the determining, by the terminal device, the grantless time domain resource based on the common control information comprises: determining, by the terminal device, the start time unit based on the common control information; wherein the start time unit is a first transmission time interval that follows a target transmission time interval, the target transmission time interval is a last transmission time interval of a downlink burst carrying the common control information, the downlink burst comprises at least one consecutive downlink transmission time interval in which the base station occupies a channel to perform sending.