The influence of adverse factors such as tilting of the movable mirror and mechanical vibration in the Fourier transform infrared spectrometer on the performance of the spectrometer is analyzed. Aiming at these influencing factors, a dynamic calibration technology with fixed mirror is used on the Fourier transform infrared spectrometer. Based on this technology, the key performance index parameters of the spectrometer are tested. Experimental results show that the performance indexes are good, which has a good reference for the design and development of the spectrometer.