Open-heart surgery for lung tumor is relatively serious, and the risk level of surgery is related to tumor size, tumor site and other factors. 1. Tumor size: the tumor of lung cancer is large in size, when the tumor is surgically removed or stripped, the wound is large, which may hurt the local blood vessels and lead to rupture of blood vessels, and it is necessary to open the chest again to stop bleeding. In this way, the risk of surgery will be high. If the size of the patient’s lung tumor is relatively small, the operation time is short and the trauma is less, the riskiness of the operation is lower. 2. Tumor location: some lung tumors may be closer to the mediastinum or the tumors may cause pressure or involvement of cardiac blood vessels, which may damage the walls of the blood vessels or damage the cardiac blood vessels, and the risk of surgery will be higher. If the location of the lung tumor is better, without involving the blood vessel wall, the surgical field is wider and there is no adhesion to other tissues, the surgical risk is relatively small. Open-heart surgery for lung tumor is recommended to be standardized under the doctor’s guidance before and after surgery. Patients should rest more, avoid smoking and drinking, eat more vegetables and fruits, and avoid spicy and stimulating food.