For a long time, the application of information technology in primary school mathematics teaching has great limitations. Teachers often regard multimedia as a tool of "machine irrigation", and the classroom becomes dull. As a powerful high-tech teaching tool, interactive electronic whiteboard not only combines the advantages of modern multimedia teaching, but also maintains the advantages of traditional ordinary blackboard. Its powerful interactive function has a great influence on the long-standing trinity of "computer+projection+blackboard" in primary school mathematics classroom teaching, enriching classroom teaching, improving classroom teaching efficiency, and providing rich, inspiring and inspiring interactive teaching and learning solutions for primary school mathematics teaching. First, the teaching advantages of multimedia interactive electronic whiteboard Discussion on the application of multimedia interactive electronic whiteboard in classroom teaching, we must first understand the functions and teaching advantages of multimedia interactive electronic whiteboard. The function and teaching advantages of multimedia interactive electronic whiteboard can be expressed as follows: (1) It has simple and intuitive application software, which is beneficial to the operation and use of teachers and students. (2) Be able to connect any computer and operate the computer on the "whiteboard". (3) By operating on the "whiteboard", the function of playing courseware, video and audio quickly can be controlled. (4) It has on-site writing function and unlimited writing space. (5) It has the function of an electronic pen ("chalk"). The electronic pen has colors and thicknesses to choose from, and there is also a "highlighter" that can flash. (six) with the function of saving blackboard writing, so that the key blackboard writing can be presented repeatedly. (7) With the help of geometric sketchpad, compasses and other tools, users can conveniently draw various standardized geometric figures, draw functional figures, and have the functions of figure decomposition and combination. (8) It has many functions of screen annotation, and can annotate different colors on the courseware displayed on the screen to attract students' attention to teachers' annotations. (nine) with "searchlight", "magnifying glass", "mask" and other light gathering and shading effects. (ten) with the function of screen video recording, recording the change process of the screen.