Air currents and optical mask of the supersonic flying object interact intensively in the atmosphere,which affects the transmit of the light,and it is called Aero-optical effects.Shock wave effect is the aero-optical effect formed first after the interaction between the object and the atmosphere.The shock wave makes the optical system defocused,the optical transfer function distorted,and makes the quality of the images decreased.This thesis makes use of the full focus optical image system which is constructed by the symmetrical wavefront coding technology to imitate the virtual image of the object.And we try to analyze and discuss how to make the optical transfer function better to restrain the effects of the defocusing optical shock wave.