In this paper, the screen layers of electromagnetic-wave absorption are made by plain inlaid knitted structure blended with 5%, 10%, 20% and 100% stainless steel yarn. Because of the special structure on knitted fabric, it can make the electromagnetic-wave interference, diffraction and multi-reflections possible on the surface screen. This research was to control the kind of conductive fiber, the component of material, the structure of needle loop, and the measured angle of screen in order to satisfy 1/4λ electromagnetic-wave absorption. Moreover, this study was found to be effective in having wide absorption band gap and great attenuation ratio of electromagnetic-wave.