Cerebral infarction pneumonectomy spit black liquid may be airway hemorrhage, gastroesophageal reflux caused by abnormal. 1. Airway hemorrhage: patients with cerebral infarction pneumonectomy, due to bedridden state, more and more lung infections, more sputum, need to repeatedly suction from the pneumonectomy, which can lead to tracheal mucosal damage rupture and bleeding. A small amount of bleeding, with the prolongation of time can be dark red or curry color, and sputum combined with sputum from the air cut out of the outflow can be similar to the phenomenon of black liquid outflow. 2. Abnormal gastroesophageal reflux: When there is a small amount of gastroesophageal bleeding, black food (such as black sesame paste) or some drugs (such as bismuth potassium citrate), there will be abnormal gastroesophageal reflux to the airway, and the patient can vomit black liquid at the tracheotomy. In case of cerebral infarction with vomiting of black fluid at the tracheotomy, prompt medical consultation is required for intervention and treatment under the guidance of a physician.