Half of the stool color yellow and half dark, if there is no other discomfort, may be related to diet, is a normal phenomenon, may also be caused by gastrointestinal bleeding and other diseases. The color of the stool is generally associated with the color of the food consumed, under normal circumstances after eating a normal diet, the human body discharged stool for the yellow or dark yellow, when eating spinach, animal blood, black rice, mulberry fruit, blackcurrant and other dark-colored food, the pigment in the food can not be decomposed or absorbed by the digestive tract may appear dark stools, or half the color of half dark stools, or half of the color of the yellow stool, etc., if there is no other discomfort, it is a normal phenomenon. If there are no other uncomfortable symptoms, it is a normal phenomenon. If the patient has gastrointestinal bleeding, the blood in the digestive tract for a long time may be oxidized to brown, which may lead to the symptom of half yellow and half dark stools, and in serious cases, accompanied by anemia, vomiting blood, dizziness and other symptoms. It is recommended that the patient should consult a doctor in time to complete the examination, and carry out targeted treatment after clarifying the condition, pay attention to dietary health in life, avoid eating spicy and stimulating foods, and follow the doctor’s instructions for regular review.