Abstract: The traditional classroom is limited by time and space, and its implicit dilemma appears and breaks out during the epidemic period. MOOC, as a typical model of online teaching, can not only solve the problem of time and space, but also has the characteristics of wide coverage, large professional span, information content, interdisciplinary subjects, high autonomy, comprehensive evaluation and scientific teaching effect. From the perspective of the first class course second language acquisition theory in Shandong Province, this paper discusses the MOOC blended learning mode based on the OBE concept, which helps to establish the teaching ecology of "students' autonomous learning as the center", so as to successfully realize the o2o closed loop of teaching.

Key words: MOOC, Online and offline hybrid, Language acquisition