A method for transmitting UCI, UE and base station. The method for transmitting includes: mapping, by UE, UCI onto time-frequency resources, wherein a subframe where the UCI is located contains one uplink reference signal or contains no an uplink reference signal; and transmitting the UCI to a base station via a PUSCH. An uplink reference signal occupies only one OFDM symbol or occupies no an OFDM symbol in a subframe, which may reduce waste of resources, and correspondingly change resource mapping of the UCI, thereby obtaining better decoding performance.