A method of transmitting a downlink control channel applied for a base station, comprising: determining a blind detection period parameter of the downlink control channel (401; 501); and transmitting the downlink control channel based on the blind detection period parameter of the downlink control channel, wherein the blind detection period parameter of the downlink control channel at least comprises: an offset value and a period value, wherein the offset value indicates an offset of a time domain resource for a user equipment, UE, to detect and receive the downlink control channel within a predetermined time domain range, the period value indicates a period for the UE to detect and receive the downlink control channel, a unit of the offset value and the period value is the same as the time domain resource, wherein the transmitting the downlink control channel based on the blind detection period parameter of the downlink control channel comprises: determining a time domain resource for transmitting the downlink control channel based on the offset value and the period value; transmitting the downlink control channel on the time domain resource, characterized in that the determining a time domain resource for transmitting the downlink control channel based on the offset value and the period value comprises: determining the time domain resource for transmitting downlink control channel by using a formula ( W × n f × 2 k + n s - T offset) mod T period = 0; wherein W is a predetermined time domain range, n f is a serial number of the predetermined time domain range; 2 k is a quantity of time domain resources corresponding to different subcarrier intervals, SCSs, within a predetermined time unit, k being a parameter related to a subcarrier interval in the predetermined time domain range, n s is a serial number of the time domain resource within the predetermined time domain range, T offset is the offset value, and T period is the period value. determining a blind detection period parameter of the downlink control channel (401; 501); and transmitting the downlink control channel based on the blind detection period parameter of the downlink control channel, wherein the blind detection period parameter of the downlink control channel at least comprises: an offset value and a period value, wherein the offset value indicates an offset of a time domain resource for a user equipment, UE, to detect and receive the downlink control channel within a predetermined time domain range, the period value indicates a period for the UE to detect and receive the downlink control channel, a unit of the offset value and the period value is the same as the time domain resource, wherein the transmitting the downlink control channel based on the blind detection period parameter of the downlink control channel comprises: determining a time domain resource for transmitting the downlink control channel based on the offset value and the period value; transmitting the downlink control channel on the time domain resource, determining a time domain resource for transmitting the downlink control channel based on the offset value and the period value; transmitting the downlink control channel on the time domain resource, characterized in that the determining a time domain resource for transmitting the downlink control channel based on the offset value and the period value comprises: determining the time domain resource for transmitting downlink control channel by using a formula ( W × n f × 2 k + n s - T offset) mod T period = 0; wherein W is a predetermined time domain range, n f is a serial number of the predetermined time domain range; 2 k is a quantity of time domain resources corresponding to different subcarrier intervals, SCSs, within a predetermined time unit, k being a parameter related to a subcarrier interval in the predetermined time domain range, n s is a serial number of the time domain resource within the predetermined time domain range, T offset is the offset value, and T period is the period value. determining the time domain resource for transmitting downlink control channel by using a formula ( W × n f × 2 k + n s - T offset) mod T period = 0; wherein W is a predetermined time domain range, n f is a serial number of the predetermined time domain range; 2 k is a quantity of time domain resources corresponding to different subcarrier intervals, SCSs, within a predetermined time unit, k being a parameter related to a subcarrier interval in the predetermined time domain range, n s is a serial number of the time domain resource within the predetermined time domain range, T offset is the offset value, and T period is the period value.