Objective To investigate the diagnosis of small intestinal haemorrhage. Methods The diagnosis and treatment of 42 cases of small intestinal haemorrhage between January 2010 and June 2015 were analyzed retrospectively. Results Among the patients, small bowel tumors were found in 15 cases,angiodysplasia in 10,inflammation disease in 9,diverticulum in 7 and obscure bleeding in 1 each. Positive rate of diagnostic methods was followed:enteroclysis 11.7％,B-ultrasound 15%, ECT 44.5%,CT 46.7％,DSA 50%, device-assisted enteroscopy 58.9％, capsule endoscopy 61.5%,enteroscope examination during operation 88.9%. Conclusion There are various etiological factors and lack of specificity in small intestinal haemorrhage. Capsule endoscopy or CT should be used first if the patient had occult bleeding, positive patients were suggested to taken enteroscopy. ECT and DSA must be applicable for active bleeding or other positive patients. Operation or enteroscope examination during operation could be the last measure.