为了获得高精度的光谱，必须对空间外差光谱仪干涉图进行校正。针对空间外差光谱仪自身缺陷导致的干涉图非均匀误差，提出了一种基于傅里叶变换的校正方法。通过理论推导发现目标光谱是非均匀误差的傅里叶变换与误差光谱的卷积，并以连续光水汽干涉图为例进行了验证实验。结果表明，在2693组实验数据中，2679组数据得到了明显的校正效果，随机抽取3组数据校正后的标准差均提升了一个数量级，验证了该校正方法的有效性。

To obtain a high precision spectrum, the interferogram of space heterodyne spectrometer should be corrected. This study proposes a correction method based on the Fourier transform to address the nonuniform distortion of the interferogram caused by defects in a spatial heterodyne spectrometer. The target spectrum is discovered theoretically to be the convolution of the Fourier transform of the nonuniform distortion and the distortion spectrum. A verification experiment os performed by taking the continuous optical water vapor interferogram as an example. The results show that, among 2693 sets of experimental data, 2679 sets of data obtained an obvious correction effect. The standard deviation of 3 sets of randomly selected data after a correction increased by the order of magnitude, which verifies the effectiveness of the correction method.