The large-scale and high-throughput synthesis of conjugated polymer based nanofibers always remain a challenge for the chemists due to the issues related to secondary nucleation in traditional batch processes. Typically polyaniline (PANT) nanofibers are synthesized under highly dilute conditions resulting in a very low throughput of few hundred milligrams per hour and a low space-time yield (STY) of 1-2 g.L-1.h(-1). In this manuscript, we report the continuous flow synthesis of PANT nanofibers which results in high throughput (17-30 g.h(-1)) and high space-time yield (140-450 g.L-1. h(-1)). These polyaniline nanofibers show high surface area (42 m(2.)g(-1)), high specific capacitance (577 F.g(-1)), and high crystallinity. Finally, the present method is generic in nature and, in principle, can be extended for the synthesis of nanofibers of other conjugated polymers via oxidative polymerization.