Objective： The purpose of investigation is to find out the behavioral characteristics of patients under anger and suggest targeted interventions. Methods: By the field questionnaire survey of three hospitals in Tianjin, 230 patients were enrolled in this study, and the characteristics of medical behavior under the anger emotion were described by statistical analysis. Results: Gender had a significant impact on refusal (P<0.05) and inward outbreak of resistance. Women were more prone to refusing and inward outbursts of resistance. The degree of education had a significant impact on outbursts. The outburst of junior high school education level was significantly higher than those of master, college and high school level. The outburst of high school education level was significantly higher than that of undergraduate. The marriage situation had a significant effect on the anger temperament rationality and inward outburst of resistance. Rational and inward outburst levels of unmarried patients were higher than those of married patients. Occupation had a significant impact the state of anger total score, anger vent, refused, anger response , interpersonal motivation, avoidance, retaliates. There were positive correlations among interpersonal violence, anger expression, trait anger, and state of anger. Conclusion: Anger will reduce the quality of medical care, inducing anger, threatening the physical safety of both doctors and patients. Reducing the adverse effects of anger, which need for doctors, hospitals, patients to take measures together.