A sunflower seed and oat syrup comprises, by weight, 80-100 parts of sunflower seed, 35-45 parts of oat, 30-40 parts of asparagus, 20-30 parts of vegetable marrow, 30-40 parts of lettuce, 20-30 parts of hawthorn fruit, 25-35 parts of kiwi fruit, 22-30 parts of sweet orange, 3-4 parts of cassia seed, 4-5 parts of lotus leaf, 5-6 parts of coix seed, 4-5 parts of rose, 4-5 parts of chrysanthemum, 3-4 parts of Phlegmariurus petiolatus, 4-5 parts of broadleaf holly leaf, 6-7 parts of green tea, 4-5 parts of Folium Phyllostachys, 30-40 parts of rice water, 20-30 parts of white granulated sugar, 10-20 parts of red wine, and a proper amount of water. The sunflower seed and oat syrup is sour, sweet and delicious, contains abundant nutrition and has a simple and environmentally-friendly making technology; and edible Chinese herbal medicines comprising the cassia seed, the lotus leaf, the coix seed and the like are added, so the syrup has a certain weight reducing effect, is healthy, is harmless to human bodies, and can be drunk by fat people.