Nursing evaluation of gastrointestinal bleeding includes the following aspects:1. Evaluate the causes of gastrointestinal bleeding, such as peptic ulcer, esophageal varices, stress bleeding, gastric cancer bleeding, etc., and further define the purpose of nursing care, nursing care and nursing care for the causes of gastrointestinal bleeding.2. Evaluate the amount of bleeding, whether it is blood in vomiting, blood in the stool, or fecal occult blood, and make focused observation for the effect of such bleeding on the body.3. Evaluate the changes of vital signs, including blood pressure, heart rate, respiration, oxygen saturation, and conscious status. Evaluate the amount of bleeding, whether it is vomiting blood, blood in stool, or positive fecal occult blood, and focus on the effects of bleeding on the body. 3. Evaluate the changes in vital signs, including blood pressure, heart rate, respiration, oxygen saturation, and consciousness, and whether the bleeding is still occurring or there is a risk of rebleeding. Based on changes in blood pressure, heart rate, and oxygen saturation, assess whether the effective circulating blood volume is adequate and then set the next key indicators for observation. Observe the color of stools and vomit according to the risk of rebleeding.