In order to improve the quality of agricultural personnel training,Senior Seminar with improving students'comprehensive ability have been added to the curriculum system of agricultural major.However,there is little research on how to teach this course in agricultural science,and there is still a lack of a consensus teaching mode.Therefore,based on the teaching practice of Senior Seminar of agronomy major in Hainan University,this study optimized the teaching mode from four aspects,including the liberalization of discussion topics,the subjection of students'roles,the flexibility of reporting forms,and the integration of ideological and political education with reporting,so as to achieve the purpose of improving the comprehensive ability of agronomy major students.The results showed that the optimization of the above four aspects was in line with the curriculum nature and training requirements of agronomy.The examination results of students had been significantly improved,and the proportion of students with good scores was increasing year by year.Moreover,students had a high degree of recognition of the teaching mode,and their exploration ability,cooperation ability,self-learning ability,language expression ability and other abilities had been improved.