Objective To discuss the diagnosis and treatment of gastrointestinal hemorrhage after operation.Methods The clinical materials(clinical manifestation and signs,gastroscope) of 16 cases of such patient were analyzed and assessed.Results 1 of 16 cases was operated and others were treated conservatively with stopping bleeding and inhibit acid drug.Conclusion The gastrointestinal hemorrhage might be caused by the acute mucosal inflammation.The relative conservative treatment might cure the disease.