The invention discloses a Gua rice noodle preparation method including three ripening steps and three aging steps, and belongs to the grain processing technology in the technical field of processing of agricultural products. The rice noodles comprise the following raw materials in parts by weight: rice 60-80 and corn 20-40. The preparation method comprises the following steps: 1, preparing of the raw materials; 2, grinding into rice flour and corn flour respectively; 3, mixing of the rice flour and corn flour; 4, primary ripening; 5, secondary ripening; 6, third ripening until the noodles are completely ripened; 7, rapid freezing and aging; 8, moistening and aging; 9, steam aging; and 10, cutting. The preparation method has relatively short production period and no impact on environment, without any food additives. By adopting the preparation method, the rice noodles using rice and corn as the raw materials can be prepared, and other rice noodles using rice and other grains (such as millet, red rice, black rice, sorghum, oats, wheat germ, soybean, mung bean, red bean, pea, black bean, purple sweet potato, Chinese yam and potato) as the raw materials can also be prepared.