Teachers' professional knowledge includes ontological knowledge, conditional knowledge, practical knowledge and operational knowledge. Ontology knowledge refers to the knowledge of a specific subject possessed by a teacher; Conditional knowledge refers to the knowledge of pedagogy, psychology, teaching methods and other related educational psychology; Practical knowledge refers to the classroom situational knowledge and related knowledge that teachers have in the face of purposeful behavior. Specifically, this knowledge is the accumulation of teachers' teaching experience.

Teachers' knowledge is an important part of teachers' professional quality. Teachers' knowledge reflects the uniqueness of teaching as a specialized profession. Teachers' knowledge is not only the necessary intellectual resources for teachers to engage in teaching activities, but also its richness and operability directly determine teachers' professional level.