An uplink waveform acquisition method, an uplink waveform feedback method, a terminal, and a base station are provided. The acquisition method includes: acquiring an uplink waveform for information transmission of a terminal; and performing information transmission according to the uplink waveform, wherein, the acquiring the uplink waveform, includes: determining the uplink waveform for current information transmission of the terminal, according to correspondence between uplink waveforms and preset conditions in communication protocols; or receiving information about the uplink waveform for information transmission of the terminal, the information about the uplink waveform being determined for the terminal and transmitted through a preset message by a network side; or receiving information about the uplink waveform for information transmission of the terminal, the information about the uplink waveform being fed back to the terminal by the network side according to reporting information from the terminal.