The clinical diagnosis of closed abdominal injury presents with symptoms such as abdominal pressure pain, rebound pain, muscle tension, mobile turbid sounds, narrowing or disappearance of the hepatic turbinate, and diminished or absent bowel sounds. The prognosis of patients with closed abdominal injuries is determined by the presence or absence of visceral injuries, often accompanied by injuries to other sites, such as traumatic brain injury, thoracic trauma and fractures, which obscure the history and signs, and make their diagnosis not easy to clarify; and because some injuries with minor manifestations may also have intra-abdominal organ injuries. Should be combined with the clinical diagnosis of closed abdominal injuries appear abdomen can have pressure pain, rebound pain, muscle tension, may have mobile turbid sounds these symptoms to diagnose, while differentiation. 1, abdominal wall contusion abdominal wall contusion refers to the abdominal wall soft tissue due to continuous external force and separation, and no anatomical complete interruption. If the injury-causing force is spiral direction, the formation of abdominal wall contusion is called abdominal wall twist contusion, the injury is more serious. Clinical diagnosis should take care to exclude intra-abdominal organ injuries. Minor abdominal wall contusion to conservative treatment, suspected of active bleeding should be early surgery. 2, simple abdominal wall injury Symptoms are mild, and can be manifested as pain at the site of injury, limited abdominal wall swelling and pressure pain, sometimes appearing subcutaneous petechial hematoma and other manifestations of soft tissue injury. Intra-abdominal organ injury can involve both the liver, spleen and other substantive organs, and can also damage the stomach, intestines and other cavity organs. 3, substantial organ injury such as liver, spleen, kidney or large blood vessel injury, the clinical manifestations are dominated by intra-abdominal bleeding symptoms. The patient’s face is pale, cold sweat, pulse is weak, blood pressure drops, pulse pressure becomes small, and those who bleed a lot may have obvious abdominal distension and mobile turbid sounds, and shock may occur in severe cases. Abdominal pain is continuous, usually not severe, and peritoneal irritation signs are not obvious, but hepatopancreatic rupture due to a large amount of bile or pancreatic fluid overflow into the abdominal cavity, the peritoneal irritation signs are obvious. In the case of subperitoneal rupture of liver and spleen, sometimes there can be abdominal masses without obvious intra-abdominal bleeding. But in the days or weeks after the injury, due to the gradual increase in subperitoneal hematoma or secondary infection, the peritoneal rupture and sudden acute hemorrhage. 4, cavity organ injury such as intestine, stomach, gallbladder, bladder, etc. rupture or perforation, the clinical manifestations of peritonitis symptoms and signs mainly. After the injury, there is nausea, vomiting, with persistent severe abdominal pain, with typical peritonitis manifestations such as abdominal muscle tension, pressure pain and rebound pain. The hepatic turbinate boundary is narrowed and the bowel sounds are diminished or absent. With the development of the disease, there may be an increase in body temperature, weak pulse, shortness of breath, decrease in blood pressure, intestinal paralysis, etc. In severe cases, infectious shock occurs. If both the parenchymal and cavernous organs rupture, the manifestations of hemorrhage and peritonitis may coexist.