The invention relates to an ultra-fine fruit-vegetable nutrient mungbean noodle and a preparation method thereof, belonging to the technical field of mungbean noodle processing. The ultra-fine fruit-vegetable nutrient mungbean noodle disclosed by the invention is prepared from corn starch, lotus root starch, ultra-fine purple sweet potato powder, ultra-fine yam powder, purple grape juice, ultra-fine grape powder, collagen protein powder, soybean peptide, edible sodium hyaluronate and a right amount of sugar. The ultra-fine purple sweet potato powder and the ultra-fine yam powder not only contain starch, but also contain lots of vitamins, trace elements, celluloses, rich amino acids and various antioxidant enzymes; and the structures of macromolecular substances such as celluloses and the like are fully degraded, thereby facilitating organisms to digest and absorb the macromolecular substances, and improving the nutritional value. The nutrient substances such as the collagen protein powder, the soybean peptide, the sodium hyaluronate and the like are added, and the substances and the lotus root starch after being dissolved in water have good viscosity, so that a prepared mungbean noodle is good in elasticity, uneasy to break and easy to be absorbed, thereby solving the problem that the existing mungbean noodles are single in components and single in nutrient structure.