The basic accomplishment that citizens must possess in modern society is mathematical literacy. Mathematics education under the implementation of mathematical literacy is committed to promoting the all-round development of students, which improves students' mathematical knowledge and skills. It plays a vital role in life and learning, and can promote the development of rational thinking and innovative ability, which can not be replaced by other disciplines. Thus it can be seen that the relationship between core literacy and discipline literacy is a whole and part. Although the relationship between disciplines is emphasized under the core literacy, it is also essential for each discipline to develop its own core literacy. Mathematics is not only a traditional discipline in compulsory education, but also a key discipline. Under the concept of core literacy, mathematical core literacy attaches importance to focusing on cognitive strategy and problem-solving ability. therefore, how to cultivate students' mathematical core literacy from the perspective of cultivating overall core literacy is also a key issue that we need to pay attention to. Based on this, this book carries out relevant analysis and research on the action of mathematics teaching reform in primary school based on core literacy from the aspects of teachers' professional accomplishment, ecological classroom construction, classroom activity design, homework design reform and comprehensive practical activity design. I hope it can provide you with some reference and reference.