The examination of intestinal obstruction mainly includes venous blood examination and imaging examination, as follows: 1. Venous blood examination: the disturbance of the internal environment can be seen, including the disturbance of electrolytes, and if the intestinal obstruction is combined with infection, the elevation of white blood cells will appear; 2. Imaging examination: if the intestinal obstruction occurs 4-6 hours later, the obvious pneumatization of the intestine can be seen in the flat position film, and the obvious air-fluid level can be seen in the standing position film.