From the perspective of critical thinking, this paper explores the path of ideological-political education in the course of Introduction to Linguistics focusing on three aspects: principles, framework and evaluation. First, in terms of the principles, the ideological-political education of the course Introduction to Linguistics should organically combine the core constituent elements of critical thinking with the concept identification, concept judgment and concept construction within the course. Second, in terms of the framework, it should focus on the comprehensive integration of critical thinking into the teaching objectives, teaching content and teaching methods. Third, in terms of the evaluation, it should start from the dual course subjects of teachers and students, to promote the sustainable development of the ideological-political education in the course through the transformation of the concepts of teaching and learning.