Through the treatment of painting art, the intuitive ability and observation ability of most autistic children have been improved to some extent. Through the integration of intuition and speech, language and the image of things are unified to improve the language expression ability of autistic children and guide them to transition from perceptual knowledge to rational knowledge; Fully affirm and encourage the artistic works of autistic children, so that they can have more opportunities for self-expression, show their unique expressions and promote the rapid development of creativity. Create different scenes by listening to music and drawing, and develop the thinking and imagination of autistic children; Promote the development of sensory perception through muscle movements such as cutting, tearing, sticking, pinching and folding; In the process of painting art therapy, autistic children feel that they are not isolated, and they become a member of this group through mutual interaction. Integrating oneself into the group and cultivating adaptability and interpersonal skills are helpful to the formation and development of healthy personality and psychological quality of autistic children. In the paintings of autistic children, it is found that they reflect others' lives less and express their inner feelings more. Therefore, in collective activities, we should pay attention to sharing works together, promote exchanges, and improve our coordination ability and sense of responsibility with the surrounding areas.