The invention discloses high-content buckwheat half-dried noodles and a making method thereof. The high-content buckwheat half-dried noodles comprise main materials and auxiliary materials, wherein the main materials comprise buckwheat flour, wheat flour, vital wheat gluten, egg white powder and the like, and the auxiliary materials comprise resistance dextrin, konjaku flour, edible salt, sorbitol liquid, sodium carbonate, potassium carbonate, edible alcohol, sterile water and the like. The making method comprises the following steps of premixing the main raw materials according to a set proportion, uniformly mixing the premixed main raw materials to obtain a mixture, placing the mixture into a vacuum dough mixer, then adding the auxiliary materials and the sterile water, performing vacuum dough mixing, then ageing the dough, extruding the aged dough, performing moderate dehydration on the extruded dough, performing tempering treatment on the dehydrated dough, finally performing packaging, and performing warehousing. According to the method disclosed by the invention, a vacuum extrusion technique is adopted, so that the addition amount of the buckwheat flour can be greatly increased, the mouth feel is smooth, and nutrient components are reserved. The buckwheat half-dried noodles disclosed by the invention are smooth in surface, smooth and tenacious in mouth feel and rich in nutrition, have unique fragrance of buckwheat, are high in content of dietary fibers, and are healthy staple food products.