Abstract: With low dimensionality, flexibility, shape-adaptable, and high integration with textiles, fiber batteries can meet the energy supply needs of circuit elements of flexible electronics. In recent years, research on fiber batteries has not only focused on active materials composited in electrodes, but exploring multi-functional, scalable, and highly integrated systems of fiber batteries. In addition, certain breakthroughs have been made in the large-scale production of fiber-based batteries, including battery assembly, integration, and continuous production. Based on this, this paper discusses the recent research results of fiber batteries in terms of fiber substrate materials and preparation processes, and it also review the latest breakthroughs in the industrial production of fiber batteries. Finally, this paper summarize the problems in the development of fiber batteries and analyze the key difficulties that need to be overcome in the future.