Aiming at the threat of active laser detection system for electro-optical devices based on “cat-eye” effect in battle field, a new method is put forward to eliminate “cat-eye” effect by using circular holes array’s intensity modulation. Based on the principles of single hole’s diffraction imaging process and spatial translation effect, intensity distribution characteristic of far-field Fraunhofer diffraction for circular holes array is deduced and then simulated. The stealth effect of “cat-eye” target is proved by experimental method by using circular holes array without changing the optical structure of electro-optical device. The results show that the echo intensity of “cat-eye” target can be modulated by circular holes array, which causes echo energy’s loss, while the effect on imaging quality is finite. “Cat-eye” target’s stealth effect is remarkable by this method.