The invention discloses high-calcium nutritious noodles and a preparation method thereof, and belongs to the field of food processing. Self-made nutritious bone soup is used for replacing water, composite flour containing various raw materials is used for replacing common wheat flour, and the self-made nutritious bone soup and the composite flour are mixed into batter which is pressed to prepare the high-calcium nutritious noodles. The nutritious bone soup is prepared from the following raw materials: pig bones, helianthus tuberosus, kelps, onions, rhizoma anemarrhenae, Chinese wolfberries, corn stigma and siberian cocklebur fruit; the raw materials of the composite flour comprise wheat flour, maize flour, soybean flour, hulless oat flour, buckwheat, konjak, Chinese yam, wheat bran, poria cocos and eel bones. Aiming at patients with diabetic nephropathy and major crowds lack of calcium, the high-calcium nutritious noodles developed by the invention are special nutritious noodles which are rich in calcium, superior protein and various nutrient components, the nutrition of the high-calcium nutritious noodles is rich, and the components of the high-calcium nutritious noodles are reasonably collocated, the calcium and the like are more suitable for human bodies to absorb, so that the utilization rate is increased, the cost is low, and any additive is not included; the high-calcium nutritious noodles are natural and pure in color, fragrance and taste, rich in nutrition, intense in taste, good in mouthfeel and convenient to eat.