The invention discloses a composite nutrition preparation suitable for controlling the body weight of astronauts and improving the immunity of the astronauts. The chenopodium quinoa instant noodles are prepared from the following 169 food materials: chenopodium quinoa flour, phycocyanin, oat flour, corn flour, millet flour, glutinous rice flour, polished round-grained rice flour, sorghum flour, broad bean flour, buckwheat flour, sweet potato flour, soybean flour, small red bean flour, hawthorn powder, chicory powder, pumpkin powder, zizania aquatica powder, lophatherum gracile powder, red date powder, celery powder, cassia seed powder, onion powder, eggplant powder, flaxseed powder, raspberry powder, sophora flower powder, dandelion powder and the like. According to the present invention, 16 spaceflight breeding food materials such as corn flour, sorghum flour, celery powder, white radish powder, mung bean powder, cordyceps militaris powder, shiitake mushroom powder, carrot powder, papaya powder, tempeh powder, black bean powder, black rice powder, chrysanthemum powder, pumpkin powder, balsam pear powder and yeast powder, fruits and vegetables, medicine and food homology, a nutrition enhancer and a flavoring agent are carefully selected and blended to prepare the spaceflight breeding food; the health-care food does not contain animal-derived food materials, edible essence, harmful substances such as pesticides, chemical fertilizers and hormones, does not contain added sugar, strengthens various micronutrients generally lacked by Chinese people, controls body, replaces meal, improves immunity and conditions sub-health at the same time, and is especially suitable for weight control and immunity improvement of astronauts.