A gas-liquid plane is not necessarily an intestinal obstruction. An intestinal obstruction is usually caused by the patient’s small intestine or colon being impassable, caused by intestinal adhesions or caused by tumors, which leads to the narrowing of the intestinal lumen, and the intestinal contents, including liquids and gases, cannot pass through the intestinal tube smoothly, which results in an intestinal obstruction. After the obstruction, the liquid and gas in the upper end of the obstructed intestinal lumen is more, in the X-ray or abdominal CT examination, it can be found that there is a gas-liquid plane, that is to say, there is liquid in the lower part of the dilated intestinal lumen and gas in the upper part, and in the middle part of the expanded intestinal lumen, it can be seen that there is a gas-liquid plane, and this usually indicates that there is an intestinal obstruction. If the patient eats too much food in the stomach, such as eating a lot of things, including drinking a lot of water, in this case, flat film or imaging examination, can also be found in the stomach there is gas-liquid plane, but it does not mean that the patient is suffering from intestinal obstruction, the specific situation should be examined in the hospital, and the combination of clinical symptoms to be able to further diagnosis.