Abstract: High-power Yb-doped fiber superfluorescent source, a fiber light source with highlightness which contained properties of fluorescence and laser, had been rapidly developed in recent years. Its output wavelength and spectral linewidth could be flexibly modulated around 1 micron wave length, achieving kilowatt-level in terms of continuous wave and pulsed output power. Therefore, the high-power Yb-doped fiber superfluorescent source had magnificent application potential in the fields of laser processing manufacturing, spectral beam combining and so on. This paper reviews the latest research progress and development. Furthermore, this paper presents our related work progress on high-power Yb-doped fiber superfluorescent source.