The dietary fiber was extracted from the skin of jack fruit, and the extractive process was optimized. The dietary fiber was extracted from the skin by zymochemistry method using α-amylase concentration, enzymatic hydrolyzing temperature, NaOH concentration, NaOH hydrolyzing temperature as the main factors of the single factor test. The optimal conditions were follows: α-amylase concentration 0.3%, enzymatic hydrolyzing temperature 65 ℃, NaOH concentration 0.5% and NaOH hydrolyzing temperature 60 ℃. Under these conditions, the extracting rate of insoluble the dietary fiber was up to 37.8%. Retention rates of starch and the protein were 6.34% and 7.88%, respectively. By extracting the dietary fiber and increasing its comprehensive utilization way, the economic and ecological benefits of planting and processing jackfruit can be enhanced, thereby promoting local agriculture and rural economic development.
