Language changes with the changes of society and develops with the development of society. Language contact will be caused by contact in various forms, such as cultural exchanges among different ethnic groups, mixed living of immigration, and trade and so on. There are different types of language contact, the most common of which is the borrowing of vocabulary. Among the elements of language, vocabulary is the most easily affected and absorbed by language contact. The influence of language contact begins with lexical borrowing. Therefore, the study of loanwords is an important subject in the study of language contact, and it is also the basis of the study of language contact from the perspective of language ontology. Lexical borrowing is a cultural phenomenon and an inevitable reflection of cultural communication in language. During the long historical development of Mongolian Horchin dialect, with the deepening contacts with the Han people and the strong influence of Chinese, a large number of borrowing phenomena in terms of vocabulary emerged. On the basis of fieldwork, this paper will mainly describe the Chinese loanwords in Mongolian Horchin dialect, and observes and analyses the characteristics of Chinese loanwords in Mongolian Horchin dialect from the perspective of language contact. It has certain theoretical value for the study of language contact.