A metallic modification technique on fabric is put forward in this paper. Morphologies and element analysis of modified fabric samples with copper and nickel-iron double films were carried out by using SEM and EDX. Shielding effectiveness (SE) on the samples was tested within 0.1~1000MHz and 1.5~18GHz. Within 0.1~1000MHz, modified fabric SE is between –93dB and –110dB. Two nickel-plated methods were compared. The measurement results of two modified fabric indicate that nickel-iron alloy films are better than nickel film on SE. With the advantages of low cost, flexibility , high electromagnetic protection characteristics, the modified fabric has a widely applicable foreground.