In this article, the issues of vocabulary development in children with autism spectrum disorders were considered. The increase in the number of children with autism spectrum disorders and the insufficient domestic methodology of methods of their correction determine the justification of the relevance of this topic.

Autism spectrum disorder is one of the groups of children in need of special knowledge, manifested in violations of the sphere of will. These children have an imbalance in the will, speech disorders and difficulties in behavior.

Children with autism spectrum disorders, in the period from R. Kanner's consideration as a personal valley to modern research, many scientific papers were written and a study was conducted. However, this topic is still insufficiently studied in Russian science.

Foreign literature and research works prove that today the most optimal method of correcting behavioral disorders in children with autism spectrum disorders is ABA therapy. Therefore, in the course of the study, pedagogical conditions were identified for studying the development of the vocabulary of children with autism spectrum disorders and its development with the help of ABA therapy. The use of pedagogical conditions in speech therapy work contributes not only to the development of the child's speech, but also to a decrease in the level of his negative behavior.

The method of the American psychiatrist I. Lovaas "learning through separate blocks" and the trajectory of work on vocabulary development in combination with the principles of speech therapy developed on the basis of the methods of "applied behavior analysis" by F. S. Skinner and the concepts of L. S. Vygotsky are proposed.  It is assumed that the proposed works will be used and successfully implemented in speech therapy classes.