The invention relates to soup stock stretched noodles and a preparation method thereof. The soup stock stretched noodles are characterized by consisting of stretched noodles and soup stock, wherein the stretched noodles consist of flour, water and a Lanzhou stretched noodle agent; the soup stock is prepared from the following materials: soy sauce, refined lard oil, refined chicken oil, water, salt, white sugar, ginger, green onion, cassia bark, pepper, dahurian angelica root, aniseed, fennel, myrcia, clove, netmeg, galangal, dried orange peel, amomum tsaoko, liquoric root, cardamun, gourmet powder. The preparation method comprises the following steps of: fusing the refined lard oil and the refined chicken oil, adding the green onion and ginger into the mixed oil, adding the soy sauce, water and seasoning into the mixed material, adding the white sugar and decocting over a small fire, adding the gourmet powder into the mixture, stopping firing and obtaining the soup stock; and cooling the soup stock, removing soup stock oil, mixing the soup stock, the soup stock oil and the water, heating the mixed material, adding cooked stretched noodles into the mixture and obtaining the soup stock stretched noodles.