Design of teaching aids for the learning and application of Braille for blind children in special schools. Using modularization, it can meet the learning stage of learning Braille in class and the consolidation stage of using and expanding Braille after class. It is suitable for the needs of blind children at different stages of learning. Using tactile-auditory synesthesia multi-sensory stimulation to improve language cognition, image perception and arithmetic ability of blind children in Braille. To meet the needs of special schools for teaching aids that adapt to the teaching content, and at the same time allow blind children to better integrate into the collective and meet their psychological needs.