The invention discloses an implementation method of a multicarrier faster-than-Nyquisy system based on Fourier transform. Zero fill rearrangement is performed on information sequences and then the information sequences are subjected to a parallel inverse fast Fourier transform IFFT module, rotation summation is performed on the output signals of the IFFT module and then pulse shaping is performed, and the shaped signals are transmitted to a receiver at a symbol rate of being faster than the Nyquisy rate at the transmitting side; and shaping pulse windowing and truncating and phase rotation are performed on the received signals and then aliasing and zero fill operation is performed, the signals after zero filling are subjected to a parallel fast Fourier transform FFT module, and rotation summation is performed on the signals after FFT so that the demodulated signals are obtained and outputted at the receiving side. According to the method, the implementation complexity of the MFTN system can be greatly reduced and the existing orthogonal multicarrier transmission system is also compatible.