Abstract:Objective：To explore superficial causes，excessive causes，and root causes of medical disputes occurred in a certain large public hospital in Gansu Province，so as to put forward comprehensive prevention and treatment suggestions to promote the comprehensive and harmonious development of the hospital. Methods：The historical tracking of 440 cases of medical disputes in the hospital from 2015 to 2019 was carried out，and the causes were deeply analyzed combined with interview method，and classified by iceberg analysis method. Results：There are three superficial reasons for medical disputes：high medical expenses，complications and excessive examination and treatment. Excessive nine reasons：doctor-patient communication does not reach the designated position，not fully，the process is not reasonable，insufficient patient privacy protection，clinical behavior is not standard and deregulation operation，improper operation，patients’ expectations too high，unsatisfactory，mental illness，drug use and drug use is not standard，invasive treatment fails to fulfill the obligation of informed consent. There are four basic reasons：inadequate diagnosis and treatment ability，low technical level，poor service attitude，poor sense of responsibility，and inadequate implementation of hospital management system. Conclusions：Medical institutions should start from the root cause and solve the problem fundamentally when they make the preventive measures of medical disputes. Therefore，in daily diagnosis and treatment work，we should continue to strengthen clinical skills，strengthen the construction of medical ethics，strengthen the sense of responsibility and professional service of medical staff，implement the medical management system，and minimize the incidence of medical disputes.