Aqueous zinc-ion batteries (ZIBs) have received much attention recently because they are environmentally friendlier, safer, and cheaper than the current Li-ion batteries. Rechargeable ZIBs are not only regarded as promising alternative energy storage systems, but have the potential to replace Li-ion batteries in many applications. Unfortunately, the formation of the dendrites on the Zn anodes, hydrogen evolution and side reactions are overwhelming challenges for the commercialization of ZIBs. Conventional strategies often focused on anode protection and the design of the electrolyte additive, but neglected the importance of the separator. In this presentation, a uniform porous separator constructed from the commercial material Kevlar (para-aramid), a type of strong synthetic fiber, was developed for aqueous ZIBs. Derived from the high-strength aramid, the separator demonstrated excellent tensile strength compared to the conventional glass fiber separators. Therefore, the developed separator shows good protection to the Zn anode by preventing Zn dendrite growth and prolonged the lifetime of the Zn symmetric cell. In addition, aramid fiber was used to construct an anti-freeze hydrogel for aqueous ZIBs, which played the roles of both separator and electrolyte. The hydrogel could significantly inhibit zinc dendritic growth and other side reactions even when operating below 0 °C. When paired with a MnO2 cathode, the hydrogel based cell shows excellent electrochemical performance in a wide range of temperatures. This work opens a gate for the development of separators and hydrogel electrolytes based on aramid fibers.