Music psychotherapy uses all music-related activities as a means to provide professional psychological treatment to patients. ?Research shows that music therapy can promote the language development of children with autism. Self-expression disorder and low self-evaluation are the common psychological characteristics of most patients with psychological disorders and many patients with physiological disorders. Music psychotherapy can treat self-expression disorders. Music psychotherapy does not mean simply listening to music and relaxing. Music therapy uses all music-related activities as a means to provide professional psychological treatment to patients, such as listening, singing, instrumental performance, music creation, lyric creation, improvisation, dance, art and other activities. Moreover, the process of music therapy must include three factors: music, the person being treated, and a specially trained music therapist. Without any one factor, it cannot be called music therapy. Self-expression disorder and low self-evaluation are the basic psychological characteristics of most patients with mental disorders and many patients with physical disorders. A person must first be able to correctly accept himself before he can successfully establish a relationship with his external world. The right connections. Music can be a medium for one's self-expression, as well as a way to enrich one's emotions and promote self-growth. In a non-threatening, safe interpersonal environment such as collective musical activities, people can freely express their emotions, emotions, ideas and thoughts through the language and non-verbal factors of music. The various music activities used in music therapy can be adapted to patients with different functional levels, so that they can all experience a sense of success in music activities, and this experience of success has a profound impact on a person's self-formation and self-esteem. Evaluation is very important. Music therapy, especially improvisational music therapy, has an obvious auxiliary role in educational and behavioral intervention for children with disabilities or autism. Studies have shown that music therapy can promote the language development of children with autism. For autistic people, their natural musical abilities are often even worse than those of normal people. One study found that the musical imitation ability of autistic children is better than that of some normal children with musical talents. Dr. Rimland, president of the American Autism Research Institute, believes that the musical ability of autistic people is almost universal. Some of them have extraordinary musical sense and very high ability to distinguish sounds. Because people with autism generally have a strong response and interest in music, appropriate music activities can enhance their sense of participation and can also greatly enhance their sense of identification with the therapist during the treatment or training process. For example, when a therapist plays a children's song that the client likes, that song can become a bridge of communication between the two people, strengthen their sense of identity, and then promote the effectiveness of treatment and training. If properly utilized, the strengthening effect of music on autistic people can enhance the therapist's leverage in treatment. For example, the therapist requires the client to name the instrument before giving it to perform musical activities; or when playing the piano, the sound of the piano naturally becomes a reinforcer for small muscle training, so using music as a reward strengthens the reward. The diversity of food can reduce the inconvenience of using food rewards, and the rewards will come more naturally. There are many studies showing that music psychotherapy can significantly promote the language development of children with autism. Reasonable music psychotherapy methods and program design can be an effective and feasible method for children with autism.