Bronchial artery embolization is the injection of embolic agents into specific bronchial arteries through catheters to block blood vessels for the purpose of hemostasis or other treatment. The application of bronchial artery embolization is as follows: 1. hemoptysis: especially for acute hemoptysis, bronchial artery embolization can be considered for those who cannot be controlled by conservative medical treatment or those who are not in a position to refuse surgical operation; 2. tumor: tumor drugs are embolized as microspheres into the bronchial artery supplying the tumor. It can increase the concentration of target vascular drugs as a way to stop tumor growth, and at the same time can block tumor blood supply to slow down growth or control tumor bleeding.