This study explores the influences of needle punching and a shear-thickening fluid (STF) on the stab resistancesandwich-structured composites made of nylon nonwoven and aramid fabrics. Needle punching and different treatments ofaramid fabric are conducted to obtain the composites. The effects of needle punching and different treatments of aramidfabrics on the sandwich-structured composites were examined using quasi-static puncture resistance, quasi-static stabresistance, dynamic puncture resistance, and bursting property tests. Results show that needle punching and incorporation ofSTF positively influence the stab resistance of the composites. This study provides an innovative method to reduce thenumber of lamination layers and decrease the weight.