Abstract: To develop polysulfonamide based high electromagnetic shielding fabrics adaptable to various application scenarios and reduce secondary electromagnetic pollution, a composite fabric with a layered structure is fabricated by combining silver nanowires (AgNWs) and polysulfonamide (PSA) fiber membranes with PSA@carbon nanotube (CNTs) fiber fabrics as the base. The effects of CNTs content, AgNWs content, and changes in the electromagnetic wave incident surface on the electromagnetic shielding performance of the composite fabric are investigated. The results show that the total electromagnetic shielding effectiveness of the composite fabric is closely related to the AgNWs content, and the layered structure of the composite fabric leads to differences in electromagnetic shielding effectiveness at different incident surfaces. When the incident surface changes from the PSA fiber membrane to the PSA@CNT fabric, the total electromagnetic shielding effectiveness remains stable, but the reflection coefficient drops from 0.9 to 0.4-0.5, and the reflection loss significantly decreases, presenting an electromagnetic shielding mechanism dominated by absorption. After the composite fabric is bent 2000 times and treated with pH=1 and pH=13 solutions, the electromagnetic shielding performance remain stable, and it demonstrates excellent acid and alkali resistance and fabric structural stability.