The invention discloses potato leaf no-alum nutrient bean vermicelli and a processing method thereof. The potato leaf no-alum nutrient bean vermicelli and the processing method thereof solve the problems that the existing bean vermicelli contains alums and is unbalanced in nutrition. The potato leaf no-alum nutrient bean vermicelli is characterized in that the potato leaf no-alum nutrient bean vermicelli is manufactured through the process procedures of gelatinization, pulp mixing, pulp liquid gas removing, steam gelatinization, aging, shredding, drying and the like and is formed by the following raw materials by weight ratio, 60-70% of sweet potato starch, 15-28% of purple sweet potato whole flour, 8-15% of sweet potato leaf flour, 0.2-0.3% of salt, 0.1-0.2% of palm oil with a 24 DEG C melting point, and 0.5-1% of sa-son seed gum. The potato leaf no-alum nutrient bean vermicelli is reasonable in weight ratio, free from alums, high in safety, even in bean vermicelli thickness, not prone to breakage and pasty soup, fresh and bright in color and luster, smooth and elastic in taste, and rich in carbohydrate, protein, fat, dietary fiber, vitamin and mineral substances such as copper, manganese, iron, potassium, phosphorus and zinc, has health efficacy of enhancing immunity, stopping bleeding, reducing blood glucose, detoxifying, preventing cancer, protecting eyesight, keeping skin fin and smooth, delaying senescence and the like, and is suitable for being eaten by most of people.