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Traditional measurement techniques have low accuracy in measuring the relative pose of spacecraft. Aiming at the above problems, a new spacecraft relative position and attitude measurement technology was studied using the Rodrigues parameter interaction model. Rodrigues parameters are used to establish the spacecraft pose acquisition model. The original vector, the rotation axis, the cross product of the original vector and the rotation axis are used as frames to obtain the vector group obtained after the rotation of the spacecraft. The quaternion theorem is used to reduce the calculation of aerospace The calculation amount of the rotation vector of the spacecraft, after observing the law of the vector change curve between the coordinate systems in the three-dimensional space, the relative pose of the spacecraft of the interaction model is measured, and the structure diagram of the interaction model based on Rodrigue"s rotation parameters is obtained to determine Rodrigues. The distance H of the lattice rotation parameter model from the spacecraft and the phase and pose errors of the spacecraft received on the ground. Calculate each pixel and grayscale of the spacecraft simulation image by Harris corner detection method, perform conditional random field calculation based on the pixel and grayscale information, analyze the relative pose characteristics of the spacecraft, and find similar ones in the three-dimensional coordinate system for multiple searches After the nearest point and the second point are reasonably matched, the relative position of the spacecraft is determined. The experimental results show that the accuracy of spacecraft relative pose measurement technology based on Rodrigues parameter interaction model is 25.88% higher than that of traditional technology, and it is more practical.