Abstract: In order to improve the measurement precision of infrared zero momentum, specific to the problem that the image positioning accuracy caused by camera pose changing was not high, an adaptive correction algorithm of CCD camera pose small angle changing was proposed. Through the theoretical analysis, a mathematical model of the CCD camera pose calculation was established and a camera pose calculation formula was deduced. According to the infrared sight aiming baseline variation detection system, specific to the three kinds of camera pose, a contrast experiment that aiming baseline coordinate was measured in the reference coordinate system was completed. The results show that the calculating precision is 0.01 mil or less. and camera pose adaptive correction algorithm can decrease the error of the infrared sights zero momentum measurement caused by camera tilt, which provided a new method of camera position adaptive compensation for enhancing zero momentum measurement precision.