Compound Fluorouracil Oral Liquid has certain efficacy in the treatment of gastric cancer and esophageal adenocarcinoma, but it is only used as auxiliary treatment to relieve the symptoms, and it is difficult to completely cure the malignant tumors of digestive tract. Fluorouracil oral solution is a commonly used chemotherapeutic drug in clinic, which is mainly used to inhibit DNA synthesis to achieve the effect of tumor treatment. Compound fluorouracil oral solution for local lesions can achieve relatively good results, but it is difficult to carry out the whole body of the tumor cell killing, and a single chemotherapy, often the therapeutic effect is not ideal, so this treatment is only for the poorer can not carry out comprehensive treatment of the patient, temporary relief of obstruction and other symptoms. Therefore, this treatment is only applicable to part of the population in the clinic, and regular application can achieve better therapeutic effect. Gastrointestinal malignant tumors are difficult to treat and have a poor prognosis, so it is recommended to consult oncologists or gastroenterologists for regular treatment to avoid delays.