This study conducts an experimental investigation into the implementation of a progressive dynamic grouping teaching model in primary school swimming classes. Grounded in the New Curriculum Standards, it explores whether a teaching grouping model that is both progressive and dynamic, capable of consistently meeting the diverse learning needs of different students, can better fulfill the requirements of "effective teaching, frequent practice, and regular competition" in primary school swimming instruction. The aim is to enhance educational quality, promote the realization of personalized learning, increase students' learning interest and motivation, fully improve the teaching efficiency of primary school swimming classes, and cultivate a new generation of students who are more competitive and creative.