With the rapid development of science and technology in today's society, great changes have taken place in all aspects of human life. The education industry has also been continuously innovated under the impetus of information technology. The rise of network information technology has significantly improved the transmission amount and efficiency of knowledge, breaking the time-space boundary of education and teaching. It provides abundant educational resources and more convenient educational methods for education and teaching, which has a certain impact on the traditional educational methods. Driven by science and technology, the application of blended teaching mode is born, which is a new teaching method produced with the development of network information technology. The combination of online teaching and offline teaching is a revolution to the traditional teaching method. Under this background, primary school mathematics teaching must change the traditional teaching methods, take moral education as the fundamental task, and give full play to the important role of primary school mathematics curriculum in cultivating students' innovative ability and creative spirit. Combined with the attributes of mathematics subject and the practice of primary school mathematics teaching, the mixed teaching mode provides a new idea for primary school mathematics teaching, which is of great significance to the implementation and development of primary school mathematics teaching.