Vietnam and South Korea are increasingly expanding and developing partnerships in many fields of economy, culture, society and life. More and more South Korean companies as well as South Korean citizens are coming to live and work in Vietnam and/or with Vietnam. Therefore, the exchange and integration in administrative work between the two countries is indispensable and extremely necessary. That is the reason why we choose to research the contrastive analysis of linguistic features in public administrative documents in Vietnamese and South Korean languages to help the interaction activities of public service documents between the two countries, two language systems be always convenient, accurate, legal and meet administrative requirements. In this research, we will compare the linguistic features in public administrative documents in Vietnamese and South Korean in terms of: the text structure, the characteristics of words, sentences and the arguments in the public administrative documents to find the similarities and differences in culture, thinking, and language.