The invention provides gluten-free instant noodles and a preparation method and a formula thereof and relates to the field of food deep processing. The gluten-free instant noodles are mainly prepared from cereals such as Chinese Northeast non-glutinous polished rice, Chinese Northeast non-glutinous unpolished rice, Chinese Northeast black rice and millet with manufactured goods which are rich in nutrition and have health care effect serving as minor ingredients by means of technologies of flour milling, flour mixing, standing for a while, primary extrusion, secondary extrusion, aging treatment, variable-temperature drying, ventilative cooling, cutting and weighing, bundling, bagging, inspection, sealing packing, boxing and the like. The obtained noodles are chewy, refreshing and slippery, avoid being mixed with soup, breakage and adhesion during cooking and are good in taste. What is more important is that the noodles are smooth, glistening and pleasing in appearance before being cooked, make people appetitive and can completely reach the international highest safety index of gluten content not exceeding 5-10PPM, thereby being more nutritional and safer. Moreover, production efficiency is improved greatly, energy consumption and pollution discharge are reduced, and more environment friendliness and lower carbon are achieved.