The natural graphite was used as main body to prepare super-fine FeCl₃-GIC by means of ration-blended method. The layer structure of samples was investigated by X-ray diffraction. The results show that stage structure is 3 and 4 stage co-existed,and primary element of product is 3 stage. The lattice distance of 3 stage FeCl₃ -GIC is 0.945 nm. The magnetization intensity and magnetic susceptibility of FeCl₃-GIC were measured with vibration magnetometer. With energy dispersion spectrometer,the concentration change of carriers was shown. The charge transfer model was set up and GIC′s conductive mechanism was analyzed. Moreover,the property of super-fine FeCl₃-GIC interfering infrared imaging apparatus was tested. The results show that product can shield photoelectricity instrument at the military far infrared frequency.