How long can liver cancer live if it vomits blood needs specific analysis and cannot be generalized. Vomiting blood from liver cancer indicates that the disease is serious and has reached the advanced stage, which requires timely improvement of relevant examinations and targeted active treatment to reduce the bleeding. And the survival time depends on the patient’s physical condition, specific bleeding situation and treatment. That is, if the patient has a better underlying condition, less bleeding, and is effectively treated, the survival period may be longer. However, the overall prognosis is poor, and the survival time is often less than 3 months. Therefore, early detection and timely treatment of liver cancer is very important. Patients must pay attention to timely visit the medical oncology department of regular hospitals after discovering the disease and have a reasonable treatment plan formulated by professional doctors, while maintaining an optimistic attitude and fully cooperating with the treatment.