Abstract: Outcome based education（OBE）concept is a new teaching philosophy under background of engineering education professional certification, advocating for outcome oriented teaching process design and optimization of teaching methods．Aiming at problems of strong engineering and practicality, insufficient theoretical and application orientation in assessment of Mechanical Manufacturing Technology in undergraduate courses of agricultural mechanization and automation, a process based assessment method reform based on OBE concept was proposed．Using course assessment as baton and engineering application problems as cases, quickly and effectively guide students to adjust their learning methods, improve their participation in teaching process, and explore specific application of theoretical knowledge of mechanical manufacturing technology in field of agricultural engineering．Reform of assessment methods not only reflected application oriented goal, but also achieved goal of comprehensively evaluating learning effectiveness of students．It was of great significance to effectively improve teaching quality and student training quality of this major．