Provided is a data processing method and apparatus. The method includes: performing an inverse fast Fourier transform (IFFT) on frequency-domain data of L consecutive symbols to obtain time-domain data of the L consecutive symbols, wherein the frequency-domain data of the L consecutive symbols have a subcarrier spacing of fsc, and L≥2; and modulating the time-domain data of the L consecutive symbols with a preset function, where the modulated time-domain data of the L consecutive symbols have a symbol interval of 1/f1, and f1