A fruit and vegetable product for curing oral ulcer, and a preparation method thereof. The fruit and vegetable product is made by mixing the following crude materials of different parts by weight: vegetables and/or fruits of 30-100 parts, food additives of 0-15 parts, probiotics powder of 0-5 parts, and recipients of 0-40 parts, the vegetables and fruits being cool and cold, cool and mild, and cold and mild and the vegetables or fruits being cool, cold or mild in the theory of traditional Chinese medicine.
