In the mathematics teaching of senior grade in primary school, we should carry out and implement the experiential teaching deeply, and teachers can make use of multimedia technology to realize it. Seen from the advantage of multimedia teaching, the collection of sound and image in one, can give the primary school students with multiple sensory nerve stimulation. Therefore, teachers can adopt certain teaching strategies in teaching practice. Firstly, teachers collect teaching resources by using Internet information technology, and do a good job of lesson preparation, so as to lay a foundation for enriching mathematics teaching content and stimulating students' learning interest. Secondly, teachers start from the perspective of primary school students' interest. In experiential teaching, teachers add scientific and technological means to stimulate students' sense of resonance, form a good interactive teaching atmosphere with students, and promote the in-depth development of primary school mathematics education. In this process, can attract the attention of primary school students, stimulate their thinking ability, mobilize their learning initiative, and so on, but also help to cultivate students' independent learning ability and quality.