The invention discloses nutritional health-care and health-preserving noodles and a preparation method thereof. The noodles comprise the raw materials in parts by weight: 100-300 parts of flour, 5-30parts of passiflora edulis, 10-50 parts of celery, 4-30 parts of edible salt, 1-10 parts of lotus plumule, 2-25 parts of hawthorn, 10-50 parts of konjac powder, 2-20 parts of lotus leaf, 5-40 parts ofteasel gourd, 3-30 parts of yolk, 5-35 parts of pumpkin powder, 2-20 parts of oat kernel, 0.5-10 parts of poria cocos and 30-70 parts of tartary buckwheat. The passiflora edulis, celery, lotus leaf and teasel gourd are washed cleanly and juiced to produce a mixture A; the mixture A is stirred with other raw materials, and then the obtained mixture is sterilized and packed after curing, rolling, slitting, drying and cutting. The prepared noodles have the advantages of smooth, glittering and translucent surface, no breaking, no leaching, no sticking and no pulping when being boiled for long time, have smooth, mellow, full, tough, chewy, non-stiffing, soft and palatable mouthfeel, have certain health-care effects such as reducing blood pressure and losing weight, and have broad market prospects.