A control information transmission method, comprising: determining, by a transmit end, a first time domain resource of first-type control information and scheduled data of the first-type control information; determining, by the transmit end, a second time domain resource of second-type control information and scheduled data of the second-type control information; and determining, by the transmit end, whether the second-type control information or the scheduled data of the second-type control information meets a preset condition; and if the second-type control information or the scheduled data of the second-type control information meets the preset condition, sending, by the transmit end, the second-type control information and the scheduled data of the second-type control information in the first time domain resource, wherein: the preset condition comprises at least one of the following conditions: a priority of the scheduled data of the second-type control information is higher than a priority of the scheduled data of the first-type control information; a data type of the scheduled data of the second-type control information is a triggering event, and a data type of the scheduled data of the first-type control information is a periodic event; or a transmission period of the second time domain resource is not greater than a transmission period of the first time domain resource; and wherein: the first time domain resource comprises J child time domain resource groups, and each child time domain resource group comprises at least one child time domain resource, wherein J is a positive integer not less than 1; and the sending, by the transmit end, the second-type control information and the scheduled data of the second-type control information in the first time domain resource comprises: sending, by the transmit end, the second-type control information and the scheduled data of the second-type control information in at least two child time domain resource groups. determining, by a transmit end, a first time domain resource of first-type control information and scheduled data of the first-type control information; determining, by the transmit end, a second time domain resource of second-type control information and scheduled data of the second-type control information; and determining, by the transmit end, whether the second-type control information or the scheduled data of the second-type control information meets a preset condition; and if the second-type control information or the scheduled data of the second-type control information meets the preset condition, sending, by the transmit end, the second-type control information and the scheduled data of the second-type control information in the first time domain resource, wherein: the preset condition comprises at least one of the following conditions: a priority of the scheduled data of the second-type control information is higher than a priority of the scheduled data of the first-type control information; a data type of the scheduled data of the second-type control information is a triggering event, and a data type of the scheduled data of the first-type control information is a periodic event; or a transmission period of the second time domain resource is not greater than a transmission period of the first time domain resource; and wherein: the first time domain resource comprises J child time domain resource groups, and each child time domain resource group comprises at least one child time domain resource, wherein J is a positive integer not less than 1; and the sending, by the transmit end, the second-type control information and the scheduled data of the second-type control information in the first time domain resource comprises: sending, by the transmit end, the second-type control information and the scheduled data of the second-type control information in at least two child time domain resource groups. a priority of the scheduled data of the second-type control information is higher than a priority of the scheduled data of the first-type control information; a data type of the scheduled data of the second-type control information is a triggering event, and a data type of the scheduled data of the first-type control information is a periodic event; or a transmission period of the second time domain resource is not greater than a transmission period of the first time domain resource; and wherein: the first time domain resource comprises J child time domain resource groups, and each child time domain resource group comprises at least one child time domain resource, wherein J is a positive integer not less than 1; and the sending, by the transmit end, the second-type control information and the scheduled data of the second-type control information in the first time domain resource comprises: sending, by the transmit end, the second-type control information and the scheduled data of the second-type control information in at least two child time domain resource groups.