Soluble dietary fiber dissolved in water can soften the feces in the intestine, act as a lubricant, and is beneficial to defecation; When the stomach swells with water, it will feel full, which can reduce the intake of extra food and lose weight. It can prolong the emptying time of stomach, delay the absorption of sugar and control the excessive increase of blood sugar; It can promote cholesterol to synthesize bile and reduce cholesterol level; Therefore, soluble dietary fiber is superior to insoluble dietary fiber. Amorphophallus konjac is the food with the highest soluble dietary fiber content, and the soluble dietary fiber content of high-quality refined konjac powder is as high as 85.3 g/100 g after extraction and purification. The research of Amorphophallus konjac in Southwest University began 40 years ago, and it is the earliest university engaged in the research of Amorphophallus konjac in China. Dietary fiber powder and dietary fiber granules produced by Xida University are a good supplement to daily dietary fiber intake.