Abstract: A method and device for use in reporting terminal capability, the method including: determining a frequency band pairing combination in an operating band that is supported by a terminal-side equipment, the frequency band pairing combination being composed of a first frequency band that consists of a first uplink operating frequency range and a first downlink operating frequency range as well as a supplementary uplink frequency band that consists of one or more second uplink frequency ranges; determining terminal capability information of the terminal-side equipment within the frequency band pairing combination, the terminal capability information including a first frequency band identifier, terminal uplink capability information and terminal downlink capability information that correspond to the first frequency band, as well as a supplementary uplink frequency band identifier and terminal uplink capability information that corresponds to a supplementary uplink frequency band; reporting the terminal capability