Aiming at the problem that it is difficult for the Photo-elastic modulation Fourier transform spectrometer to collect a complete period of laser interference signal and cannot perform the real-time restoration of the spectrum, this paper designs a real-time restoration of the Photo-elastic modulation Fourier transform spectrum based on LabVIEW. First, a He-Ne laser with a wavelength of 632.8nm is selected as the light source. After the incident laser passes through the Photo-elastic modulation Fourier transform spectrometer, an interference signal that changes with time is generated, and then the interference signal is converted by a Photo-elastic detector to obtain interference data. Finally, use a high-speed data acquisition card to collect the data [基金项目：1、山西省青年科学基金（201901D211234）；2、山西省自然科学基金（201901D111145） ]and transmit it to the LabVIEW host computer, perform data processing in the spectrum restoration of the interference data, and perform wavelength calibration and restoration analysis. Experiments show that LabVIEW can obtain a complete cycle of the interference signal from the collected monochromatic laser on the host computer, and the spectrum restoration algorithm can be used to restore the spectrogram in real time. The error of the restored laser is less than 1nm, and the half-peak width is 0.01um.