The main information of hearing-impaired students comes from visual images, so their thinking stays in the stage of visual images for a long time. It is precisely because of this feature that the most effective way to teach concepts in mathematics classes in schools for the deaf is to use intuitive teaching method, which helps hearing-impaired students to establish mathematical concepts, learn relevant laws and form operational skills, so intuitive teaching plays a very important role in teaching in schools for the deaf. Using visual teaching AIDS can encourage students to do it themselves and use their brains. Students can use their own hands and brains to keep their thinking in the best condition, so as to actively think, consciously accept new knowledge and keep a deeper and lasting impression on new knowledge.