The invention relates to high-protein high-dietary-fiber biscuits containing collagen. The high-protein high-dietary-fiber biscuits consist of the following compositions in parts by weight: 90-100 parts of low-gluten flour, 10-18 parts of soy protein isolate, 40-50 parts of wheat bran, 10-15 parts of wheat germs, 10-15 parts of oatmeal, 10-20 parts of butter, 15-20 parts of vegetable oil, 10-20 parts of white granulated sugar, 30-35 parts of isomaltulose, 0.5-0.7 part of table salt, 0.8-1.2 parts of baking soda, 0.3-0.5 part of double-effect baking powder, 15-20 parts of yolk and 1-1.2 parts of collagen. According to the high-protein high-dietary-fiber biscuits disclosed by the invention, a scientific compounding ratio is adopted, and materials are reasonable to select, so that the made biscuits are good in taste and rich in nutrition, the high-protein high-dietary-fiber biscuits meet nutrient balance requirements, can increase intake of dietary fibers and protein, provide nutrients desired by human bodies, balance diet structure and prevent diseases of gastrointestinal tracts of human bodies, and the mouth feel and the taste of the high-protein high-dietary-fiber biscuits are loved by the public.