The seriousness of traumatic hemothorax lies in the acute loss of blood on the one hand, and in the accumulation of blood in the chest cavity that compresses the heart and lungs, leading to hypoxemia and hypercapnia and producing respiratory and circulatory disturbances similar to pneumothorax. The key to the treatment of traumatic hemothorax is to determine whether the bleeding has stopped or is continuing. Persistent intrathoracic hemorrhage is most often the result of injury to larger blood vessels within the chest and is an indication for emergency open-chest exploration. The correct treatment of traumatic hemothorax should be to remove the accumulated blood in a timely manner to allow the compressed lung to be diastolic and to prevent the formation of residual cavity and secondary pus in the chest. The prerequisite is the control of intrathoracic hemorrhage. Jin Minghua, Department of Thoracic Surgery, Shandong Chest Hospital 1, closed chest drainage, the indications are (1) large amount of hemothorax unsatisfactory by puncture and aspiration; (2) the accumulation of blood in the chest is sticky or mixed with blood clots is not easy to be extracted; (3) hemothorax suspected of combined infection. 2, dissection to stop bleeding: traumatic hemothorax patients should be urgently dissected to stop bleeding if: (1) the closed chest drainage in the first 2 hours exceeds (2) after proper blood and fluid administration, the patient’s hypovolemia or shock caused by hemothorax cannot be corrected; (3) after installation of closed chest drainage, there is blood clot in the chest cavity on the injured side, and the signs of mediastinal displacement to the healthy side cannot be improved. 3.Early dissection to remove the clot: if the blood in the chest has been clotted and the quantity is large, if the patient If the patient is in good condition, the clot can be removed by early dissection to avoid the formation of fibrous thorax after hemothorax mechanization, which affects the lung function. 4, dissection to remove the lung surface fiber plate: If the hemothorax mechanization forms a fibrous membrane, which wraps the lung tissue and affects the breathing, the lung surface fiber plate can be removed by dissection 3-5 weeks after trauma to improve the lung function of the patient. Depending on the patient’s condition and the surgeon’s proficiency, the procedure can be performed either thoracoscopically or conventionally with open chest.