According to the work principle of one aerial reconnaissance CCD camera, Descartes coordinate systems are properly build. Transformation of the coordinates is used to describe the relationship with two images which were taken in different times and scanning angles. Image affine transformation model with disturbance is derived by co-line principle. Then, a simulation analysis is given. Results of simulation indicate that volatility of image overlap rate in the direction of heading and side is determined by pitching and roll angle disturbance separately, and it can be reduced into a certain range by compensating the two attitude disturbance. Finally, it’ll meet the demand of image mosaicing. Flying test result has proved this conclusion effectively. It can supply a theory basis for the overlap rate and compensation mechanism design of the same species camera, and it also can simplify the registration process of the image mosaicing.