Embodiments of the present disclosure provide a method for enhanced transmission of control information, user equipment, a base station, and a communications system. The method includes: determining a first parameter for enhanced transmission of control information. Between a base station and UE, a kth subframe after a last subframe in enhanced transmission of control information may be preset as a start subframe in enhanced transmission of a PDSCH, a jth subframe after the last subframe in enhanced transmission of the control information may be preset as a start subframe in enhanced transmission of a PUSCH, and a start subframe in enhanced transmission of the control information is preset, where the subframes may also be radio frames. Therefore, the user equipment can accurately determine the last subframe and/or radio frame occupied by the control information, thereby ensuring performance of the PDSCH or PUSCH.