There is no certain and generalized survival period for black stool in advanced stage of liver cancer. Black stool in patients with advanced liver cancer indicates that the condition is more serious, the tumor has metastasized to the digestive tract, causing bleeding in the digestive tract and leading to black stool, there is no exact figure for the survival period of patients, the survival period may be drastically shortened, or it may be a few years. How long the patient can survive with black stool in advanced stage of liver cancer is closely related to the patient’s physical condition and whether the later treatment program is effective. If advanced liver cancer is accompanied by black stools, the condition may further deteriorate, and comprehensive treatments such as chemotherapy and targeted therapy should also be combined to actively control the process of disease development and do the best to prolong the survival period of patients. At the same time, patients with advanced liver cancer are weaker, so they should also find ways to strengthen diet and nutrition to further improve their survival quality. Black stool in advanced stage of liver cancer must be taken seriously, and it is recommended to actively cooperate with the subsequent comprehensive treatment in order to prolong the survival period of patients.