The analysis of the structure of the modern Persian language in order to identify the linguistic features of the morphological type found more than twenty features in all levels conjugated with agglutinate technique of morphemes bounding. This allows defining the modern Persian as the language of agglutinative morphological type. In other words, this allows considering the modern Persian language as so-called new agglutinate languages. Phonetic features are as follows: weak and fixed lexical accent on the last syllable, regressive vowel harmony, functioning the phrase accent instead of lexical, the minimum number of clusters at the beginning and the end of the words (consonant overlap is observed only in some recent loanwords), the minimum number of diphthongs and their rudimentary nature. Lexical-derivative features are as follows: word compounding as the leading method of creating new words without changing their forms, a special class of compound words - complex verbs with incorporated noun, reduplication as a way of creating new words, the prevalence in everyday colloquial speech of verbal and in written style of participle chains, a large number of participles, which are widely used instead of the clause. Morphological features are as follows: independent stem-root, slight structural separation of stem-root and affixes, lack of division of words into subclasses by stem classes (declensions and conjugations), numerous class of clitics, postposition r?, the minimum number of prefixes and a great number of suffixes, isolated and independent nature of affixes, the possibility of their distant use and so called group affixing, optional nature of some morphological markers. Syntactic features are as follows: isolated functioning of syntactic forms of utterance, the absence of syntactic agreement, special way of semantic coordination a subject and a predicate, the importance of the topicalization for the communicative arrangement of utterance, the final position of the verb in the sentence. The analysis revealed that most of above linguistic features were not observed in Old Persian. However, already in Middle Persian at all levels one can find the elements specific to agglutinate languages. The structure of the Persian language, from the end of I century BC, shows a strong tendency to change its own language type. It is obvious that the Persian language during the period from ancient to modern changed its fusion morphological type to agglutinative. Moreover, the active development of certain categories indicates that the process of morphological formation of the Persian language still continues.
