With the development of children’s education, parents and teachers pay more and more attention to the learning and training of children with developmental dyslexia (DD). There are many reasons for DD and various intervention tools with a large number of learning costs. In this paper, we aim to analyze the relationship between music, pinyin, and reading, and confirm the theoretical link of "music - Chinese pinyin - reading ability". Then, we sort out a method to design the music intervention tool in this article, which is a new tangible interactive tool for children with DD. This tool is composed of hardware and software and has three modules: music intervention, pinyin intervention, and reading intervention, covering a total of 11 levels and is suitable for classroom teaching, home self-study, and other scenarios, to improve the Chinese pinyin and reading abilities. Subsequently, we conducted a pre-experiment and formal experiment on 20 children with DD to demonstrate the effectiveness of this tool, while using the SUS scale to analyze the evaluation of these children. Finally, we figured that the intervention tool designed in this study has a certain helpful effect on improving the phonetic and reading abilities of children with DD, and is more effective than the three intervention methods used alone. This study has certain reference significance for the designers of intervention tools and also provides new intervention methods for teachers in training institutions. It also provides another possibility for the self-treatment and training of children with developmental dyslexia.