The invention discloses a method for correcting the uniformity of an on-orbit image of an infrared pendular scanning camera. Aiming at the on-orbit operation characteristics of a satellite, the method comprises the steps: obtaining calibration data of a satellite-borne black body and multiple ground object images, taking the relative radiation and absolute radiation correction coefficients obtained through satellite calibration as the main part, and correcting the response difference among the pixels of the pendular scanning camera through employing an on-orbit statistic method, so as to replace a conventional uniform field image correction method. The method does not need to carry out the high-low temperature imaging of uniform ground objects with the large coverage, is very good in robustness for imaging climate conditions, overcomes a difficulty that on-orbit initial quick parameter adjustment and a conventional correction method are low in efficiency, and is better in obtained effect of uniformity processing. The method is suitable for various types of infrared pendular scanning cameras, also can be popularized to the linear array sweeping infrared imaging, and meets the demands of production and application of remote products.