The object of description in the work is the phonetic system of the modern literary Kyrgyz language, the features of which found spelling only in 1921, after the national demarcation of Central Asia. Before the Great October Socialist Revolution, the Kyrgyz language was not the object of widespread special study. For the first time he gained fame in Turkology thanks to the works of V.V. Radlov, who in his work "Phonetics," devoted to a comparative description of the sound features of a number of Turkic languages, gives in separate paragraphs information about the features of the Kyrgyz language. The author describes in detail the composition of vowels and consonants of the Kyrgyz language, the phenomena of syngarmonism, combinatorial changes in consonants (compared to other Turkic languages), gives a classification of Turkic languages.