The invention relates to edible bittern and a preparation method thereof, in particular to edible oil-tea camellia bittern for rice noodles and a preparation method thereof. The edible oil-tea camellia bittern consists of sauce and oil-tea camellia in the weight ratio (1.5-2.5):1, wherein the sauce is prepared by mixing, cooking and filtering the following raw materials: water, ox vertebrae, pig ribs, pig bones, old ginger, cooking wine, fermented soya beans, salt, sugar, star anise, sand ginger, pseudo-ginseng root, cassia bark, tsaoko amomum fruit, clove, wild pepper, dried orange peel, liquoric root, common fennel, bay leaves, dahurian angelica root, clove mother, corsvenor momordica fruit, cassiabarktree fruit and vegetables; and the oil-tea camellia is prepared by mixing, cooking andfiltering the following raw materials: water, old chicken, pig bones, qingming tea, mango ginger, toasted garlic, chive, parsley and camellia-seed oil. In the method, the oil-tea camellia is preparedby frying qingmin tea with the camellia-seed oil, i.e., tea oil; tea oil does not contain any substance harmful to human bodies such as cholesterol, flavacol and the like, is a true pure natural environmentally-friendly edible oil, and can be matched with various Chinese medicinal herbs; and the edible oil-tea camellia bittern has rich nutrition, remarkable oil tea function and ideal physical therapy and body care functions.