Abstract: STEAM education is a project learning, problem-solving-oriented curriculum organization, emphasizing the cross-integration of multi-disciplinary, which plays an important role in cultivating students' innovative ability. The setting of the field of “synthesis and practice” in mathematics in primary school is to let students experience purposeful, designed, systematic and cooperative practical activities, and with the actual situation to experience the process of finding and raising problems, analyzing and solving problems. Teaching strategies in the field of “synthesis and practice” in primary school mathematics under the background of STEAM education: To determine diversified teaching objectives; To carry out practical teaching activities; To establish a “PBL”-based teaching model; To infiltrate the“ interdisciplinary ”teaching concept; To carry out socialized learning in the“second classroom ”; And to form a diversified evaluation mechanism.

Key words: STEAM Education, Primary school mathematics, Synthesis and practice, Teaching strategy