Since the medical research has becomes one of the basic responsibilities of medical staff, the education of medical research ethics plays a key role in standard transformation in the study of research ethics and publishing ethics. Based on the teaching of medical ethics for medial undergraduates, this paper discusses the feasibility of research ethics as the breakthrough point of medical ethics course to cultivate the scientific thought and ethic awareness of medical students, analyzes the shortages existing in the traditional teaching of medical ethics, and finally puts forward suggestions of the construction of medical humanism coping with the rapid improvement of medical science.