Abstract: Manganese dioxide (MnO₂) is a promising electrode material for supercapacitors with the advantages of high capacity, environmental protection and low cost. With the continuous development of smart wearable technology, fiber supercapacitors have attracted wide attention due to their flexibility and stitchability. The combination of MnO₂ and fiber supercapacitors as an important part of wearable technology has also been constantly researched and expanded. According to the current development of MnO₂ based fiber supercapacitor and the demand of wearable energy products, in this paper, the energy storage mechanism of MnO₂ in neutral electrolyte is analyzed. In this paper, a series of solutions are proposed to solve the problems of MnO₂ based fiber supercapacitors in practical wearable applications, such as the difficulty of continuous production and low practical utilization rate. At the same time, the advantages and disadvantages of various solutions and the synergistic effect of materials in the solutions are deeply analyzed, which provides new ideas for future research directions. Finally, the challenges and future development of MnO₂ based fiber supercapacitor are summarized. MnO₂ based fiber supercapacitor is expected to make great progress in the future and become a new generation of energy textiles supply system.