Abstract: To achieve a high signal-to-noise ratio, high spectral resolution spectroscopy detection performance, it needs to control the mirror reciprocating precision swing to complete uniformity scan modulation of the interference optical path difference in time modulation type Fourier transform spectrometer. Firstly, the relationship between the spectral detection performance and the scanning control performance requirements was analyzed. On this basis, according to the high performance requirements, a controller design method based on the pole assignment was proposed. Referencing the state feedback design results, the forward and the feed-forward link was used to realize effectively. The controller design and the difficulty of the realization was simplified. The simulation results show that the proposed method is effective.