Based on the solubility in water, fber can be divided intosoluble fber andinsoluble fber, which also has a diference in the physiological propertes. Propertes of water-soluble such as forming a viscous solutons, has great water holding capacity but is unable to maintain the water, and easily to fermented. While insoluble fber is less viscous, lower water-binding capacity but greater ability to maintain a water and difcult to fermented(