Simethicone oil belongs to the oil preparation of the drug, its alias is called dimethicone 350, this drug is mainly used for the treatment of gastrointestinal diseases, clinically can be used for the treatment of gastric distension caused by excessive production of gas in the gastrointestinal tract, especially suitable for abdominal distension disease, because this drug does not have any other abnormal taste, taking is more convenient, so for the patients with abdominal distension, it is very easy to accept. It can also be used as an auxiliary drug for imaging examinations, such as x-ray ultrasound, gastroscopy and so on, the use of this drug can play a role in enhancing the effect of visualization, which is conducive to the diagnosis of the disease.