The monograph is devoted to one of the urgent problems of speech therapy - general speech underdevelopment (GSU) of preschool children in the context of Uzbek-Russian bilingualism. The monograph presents scientific-theoretical and scientific-methodical materials of the conducted research: paradigms, concept and technology of correctional and speech therapy work to overcome speech underdevelopment in preschool children in the context of bilingualism in their native language and presents pedagogical recommendations for teaching Uzbek preschool children with general speech underdevelopment the Russian language. The monograph has a scientific and prognostic style of presentation of materials, the reliability of the study is substantiated by mathematical statistics on ACT and is intended for scientists, doctoral students, independent researchers, masters and teachers and students of special and inclusive and general pedagogical specialties.