The invention discloses a method for lowering deoxynivalenol in fine dried noodles. The method includes the following steps: wet fine dried noodles are prepared with flour, sodium carbonate and water as raw materials and then are dried, and removal of deoxynivalenol in the fine dried noodles is completed. In the method, the amount of sodium carbonate is 0.6-1.0% of the dry weight of the flour; in the drying step, the temperature is 40-80 DEG C, the relative humidity is 70-85%, and the drying time is 3-5 hours. The method provided by the invention can effectively reduce the deoxynivalenol (DON) content in the fine dried noodles, wherein the DON toxin can be lowered from 1.92 mg/kg to the national limited standard (1 mg/kg) or less in the drying process, and the DON content after cooking is lowered from 4.50 mg/kg to the national limited standard (1 mg/kg) or less; and the method has great significance on lowering the intake of the DON toxin and lowering the health risk of the DON toxin to human bodies.