Aiming at the problem of the imaging distortion caused by the acousto-optic interaction, which is inherent in acousto-optic tunable filter (AOTF), the distortion characteristic of AOTF camera is analyzed by AOTF analytic expressions and geometric aberration formulas. The image distortion model of the acousto-optic interaction is established, and the relationship between the distortion coefficient and the incident light propagation angle is showed. The two-step calibration method and the bilinear interpolation method are employed to correct and analyze the distorted image based on the constructed distortion model. The experimental results show that the maximum distortion pixel displacement of the image captured by the no-AOTF camera system is 1.6 pixel, while the maximum distortion pixel displacement of the image captured by the AOTF camera system is 9.0 pixel. The maximum distortion pixel displacement is 1.4 pixel after distortion image is corrected, which is better than the image captured by the no-AOTF camera system. The distortion model is introduced to describe the distortion mechanism and characteristics of AOTF camera. The distortion correction method can solve the problem of image distortion of AOTF camera imaging process effectively, and it has a good application prospect in the accurate measurement of AOTF spectrum camera.