The invention relates to low-oil-temperature instant noodles subjected to far infrared drying and a preparation method thereof. The preparation method comprises the steps of kneading a dough prepared from wheat flour, starch, water chestnut flour, raw peanut pulp, a mixed thickener, salt and an edible emulsifier, boiling, rolling, shredding, cooking, cutting off, uniformly spraying low-temperature frying oil on the upper and lower sides of the noodles, carrying out secondary far infrared drying and shaping and obtaining an instant noodle lump after cooling. The preparation method has the advantages that the instant noodles have high nutritive value; the oil content of the pastry is controlled; and the reconstitution property, taste and flavor of the fried instant noodles are maintained.