The invention relates to ready-to-eat nutritious lithocarpus glabertofu and a preparation method thereof and belongs to the technical field of food processing. The ready-to-eat nutritious lithocarpus glabertofu is prepared from the following raw materials in parts by weight: 200-500 parts of lithocarpus glaberpowder, 80-130 parts of sweet potato powder, 55-78 parts of tapioca flour, 12-35 parts of quinoa flour, 65-90 parts of guarana powder, 22-35 parts of arrowhead powder, 5-12 parts of tall gastrodia tuber powder, 8-15 parts of ganoderma lucidum powder, 5-10 parts of sanchi powder, 3-8 parts of safflower powder, 3-8 parts of medicine terminalia fruit powder, 2 parts of propolis and 5-9 parts of honeysuckle flowers. The ready-to-eat nutritious lithocarpus glabertofu is made of lithocarpus glaber as a main raw material, and other raw materials with various nutrients are added; the tofu is bright in color, tough and smooth, tastes smooth, has cooling and heatstroke prevention effects of the original lithocarpus glabertofu, also has effects of clearing away heat, removing toxin, killing bacteria, eliminating germs, promoting digestion, enhancing immunity and the like, and is suitable for being eaten by people of all ages.