Oily floating stool can be caused by a variety of reasons, mostly due to eating too much greasy, fatty food; poor digestion caused by pancreatitis and gastrectomy; insufficient bile secretion caused by biliary tract diseases, gallstones, cirrhosis and other diseases; intestinal mucosa lesions caused by mouth sores, enteritis and other diseases that affect absorption; reduced family genetic esterification ability, celiac particle formation and low transport, and many other reasons. You should go to the gastroenterology department of a regular public hospital in time to get a clear diagnosis, identify the cause, and have the specialist take appropriate treatment for the cause to avoid delaying the condition. At the same time, you should avoid drinking full-fat milk, avoid foods with high oil content, eat meat as lean as possible, and eat more vegetables and fruits.