Embodiments of the present invention provide a method and an apparatus for transmitting a physical uplink shared channel (PUSCH). The method includes: determining a time domain location for transmitting the PUSCH according to a downlink transmission time interval TTI for receiving a scheduling grant; and transmitting the PUSCH in the determined time domain location; wherein the scheduling grant comprises at least one of: indication information for indicating whether to transmit a demodulation reference signal DMRS; first time domain location related information for transmitting the demodulation reference signal DMRS; second time domain location related information for transmitting data; information on frequency domain density of the demodulation reference signal DMRS; and frequency domain offset information of the demodulation reference signal DMRS.