Pneumothorax caused by automobile accident is usually a closed injury and open injury, there may also be tension pneumothorax, which can be treated by conservative treatment or puncture drainage according to different injury conditions. 1. Closed injury: if the volume of closed pneumothorax is not big, then it can be treated with conservative treatment such as continuous bed rest and oxygen intake, and the normal volume of air intake will be absorbed by itself gradually, and then it can return to normal; if the volume of air intake is big, then it is feasible to use thoracic puncture and closed drainage to expel the gas in the thoracic cavity. 2. Open injury: open pneumothorax is first transformed into closed pneumothorax, the wound can be blocked with impermeable objects, and the wound can be urgently sent to the hospital with oxygen intake, supplementation of blood volume, correction of shock, timely debridement and suturing and retention of closed chest drainage, application of antibiotics, and promotion of postoperative recovery. 3. Tension pneumothorax: If tension pneumothorax needs to release the other in the chest cavity in time and avoid air entry, the needle with one-way valve device can be used to puncture and deflate, to maintain the vital signs, and closed chest drainage can be carried out at a later stage. After the occurrence of pneumothorax need to be timely and correct treatment, to early to the hospital examination and treatment, to avoid delaying the condition.