A transmitting terminal and a method for transmitting data are provided by the present invention, in which a multiple access mode is extended when transmitting upstream data. The method comprises: when the transmitting terminal transmits the upstream data, if the transmitting terminal has higher requirement on link performance than on time domain coverage, selecting the multiple access mode of OFDMA; and if the transmitting terminal has higher requirement on time domain coverage than on link performance, selecting the multiple access mode of SC-FDMA, and after selecting the multiple access mode, the transmitting terminal processing and then transmitting the data to be transmitted. The invention is adopted to solve the problem that a single multiple access mode cannot be well suitable in the related art, ensure the link performance of OFDMA, be beneficial to enhance the throughput of the entire network.