Mongolian is one of the ancient national languages and belongs to the Mongolian family of Altai language family. The main users are Mongolians, mainly distributed in Mongolian inhabited areas of China people, Inner Mongolia Autonomous Region, Mongolia and the Siberian Federal District of the Russian Federation. The Mongolian language in China is mainly distributed in Inner Mongolia, Xinjiang, Qinghai, Gansu, Jilin, Heilongjiang and other provinces, and it is facing a serious problem of sinicization. Mongolian is a kind of adhesive language, and its main feature is that there is a strict vowel harmony law in pronunciation, that is, harmony is carried out according to vowel tongue position or round lips. For example, in a word, it is either a postvowel (positive vowel) or a middle vowel (negative vowel). But the front vowel (neutral vowel) and the back vowel or middle vowel can appear in the same word. Morphologically, it is based on the root or stem, followed by additional components to derive new words and change the shape of words; Nouns, pronouns, adjectives, numerals, adverbs, postpositions and verbs all belong to the grammatical category of person, number or case; Verbs belong to grammatical categories such as tense, aspect, state and form. According to structuralism, the word order in a sentence is regular. Usually the subject comes before the predicate, the modifier comes before the modifier, and the predicate comes after the object.