The invention discloses an urination-promoting and dampness-excreting oxtail. The urination-promoting and dampness-excreting oxtail is prepared by the following raw material drugs in parts by weight: 120 parts of oxtails, 6 parts of table salt, 4 parts of white sugar, 4 parts of peanut oil, 3 parts of peels of bunge pricklyash, 2 parts of peppers, 4 parts of garlic, 5 parts of fresh ginger, 1 part of spice-leaves, 2 parts of barks of Japanese cinnamon, 2 parts of anises, 2 parts of cinnamons, 1 parts of amomum fruits, 2 parts of dahurian angelica, 4 parts of common achyranthes herbs, 2 parts of cordate houttuynia, 2 parts of barbed stullcap, 2 parts of leonurus heterophyllus, 2 parts of plantain, 4 parts of cogongras rhizome, 0.1 part of bog rushes, 44 parts of carrots, 18 parts of tomatoes and 8 parts of cider vinegar. Compared with prior art, the urination-promoting and dampness-excreting oxtail prepared according to the invention is developed for young children; the meat of the urination-promoting and dampness-excreting oxtail is rich in nutrition, heavy in aroma, unique in flavor, high in protein content, low in fat and high in calcium; the urination-promoting and dampness-excreting oxtail has the functions of clearing away heat and toxin, promoting urination and excreting dampness. Diseases such as acute and chronic nephritis and urinary tract infection in children can be effectively prevented and treated by long-term taking of the urination-promoting and dampness-excreting oxtail disclosed by the invention.