Objective　To investigate the influence of service-learning model on medical graduates' ethical behavioral tendency. Methods　A self-designed questionnaire was conducted among 302 medical students who have graduated in the last five years including the basic information， ethical behavioral tendency and participation of service-learning. The acquired data was analyzed and com-pared using chi-square test and unconditional logistic multiple regression. Results　68.2%（206/302） undergraduates participated in service-learning. Undergraduates participated in service-learning be-haved more ethical than those did not participated when facing the situation of patient' vomits （P=0.037）. There were statistical differences in taking bribes from patients between those participated in service-learning and those did not （P=0.031）. According to the results of unconditional logistic multiple regression analysis， whether participating in the service-learning is one of significant factors influenc-ing undergraduates' attitude towards bride-taking. Conclusions　Medical students educated by service-learning model will exhibited more ethically accepted medical behaviors after becoming doctors. Ser-vice-learning model， a new medical education model， is worth promoting.