Confronted with the requirement of the high resolution earth-observation system of high-speed aircraft working in near-space environment,and the imaging system with dynamic optical windows is likely to suffer from extreme dynamic aberration,complex imaging quality compensators and bad real-time character,the traditional imaging quality compensation was improved and the adaptive optical (AO) technique was explored as a novel way of solving the problems.The image sharping function optimization closed-loop adaptive wavefront correction algorithm was used.Simulations results indicate that the correction method can make the PV (peak to valley) waves of the Zernike aberration term in reduce to about 17.5% and the RMS spot radius to about 10.61% less than before correction the system which has 60°FOR (field of regard).By correction with this method,the residual aberration is much less than the baseline system and the imaging performance can be almost diffraction limited.