Patients with intestinal obstruction cannot be seen by routine blood tests, but can only be used as an adjunctive test, for example, in patients with significant dehydration, the hemoglobin value and hematocrit are elevated. The diagnosis of intestinal obstruction is mainly confirmed by abdominal fluoroscopy, CT and other imaging tests. Patients with intestinal obstruction may present with typical symptoms of abdominal pain, vomiting, abdominal distension, and stopping of anal defecation, while some patients may present with atypical symptoms, and may be found to have significant distention of the intestinal tubes as well as flatness of the intestines on abdominal fluoroscopy, and may be given an abdominal CT if necessary, in order to confirm the diagnosis. The blood routine is mainly through the blood of red blood cells, white blood cells, platelets and hemoglobin and other components of the examination, and intestinal obstruction patients blood routine is not obvious abnormalities. For patients with intestinal obstruction, when there is severe dehydration, it can lead to blood concentration, so there will be an increase in hematocrit. It is recommended that the patient go to the hospital in time to improve the auxiliary examination, in order to clarify the condition, and the professional physician will give treatment for the condition.