While moral and political education for university students becomes more and more crucial in recent years, this study aims to explore the practical way of moral and political teaching in translation courses. According to the functions and mechanisms of Intrinsic Motivation in Self-Determinism Theory, the paper puts forward a hypothesis of closed-loop circulation among Collaborative and efficient interaction between teachers and students, and among students,Enhancement of Learning Autonomy and Improvement of Intercultural Communicative Competence, based on which a three-step circular interactive teaching mode of Independent Learning of Pre-class Assignments, Knowledge Internalization in Class Activities, and Communicative Competence Development through Extracurricular Translation Practices was constructed. Furthermore, teaching effectiveness was quantitatively analyzed by Five-point Likert Scale which shows that the teaching approach can effectively stimulates students’ intrinsic motivation to learn, improve their communicative skills and cultivate them with good values and moral integrity.