In this study, we used the method of electroless Ni-plated onto the different kind knitting fabric with oxidation reduction to covered in Ni panniculus. Nevertheless, the different kind of knitted fabric can also promote the electromagnetic wave absorbent and shield. The results show that when the knitting fabric is 15 mm, the EMI Shielding and Absorbing Effectiveness can get the best value, and after piled the knitting fabric, the value of the electromagnetic wave absorbent will be increased.