Abstract:Teaching principle is the code of conduct for teaching activities. Principles of mathematics teaching, as the refined essence to guide and improve the quality of mathematics teaching, are the methodological knowledge and teaching behavior norms that should be followed in mathematics teaching. Based on the requirements of the educational policy such as "morality education is the fundamental task of education", six principles of middle school mathematics teaching are summed up: the principle of mathematical value orientation, the principle of cultural immersion in mathematics, the principle of mathematical literacy development, the principle of educational mathematics implementation, the principle of mathematical cognitive construction, and the principle of mathematical discovery and innovation. Of these, the first two principles focus more on the building of mathematical morality, while the later four focus more on the cultivating of mathematical talents.