This paper explains the situation of Mandarin, Suzhou dialect and English in Suzhou, the relation between language policy and language use, discusses the positive and negative consequences that multilingualism in Suzhou might have for the society, and focuses on the change of language use in Suzhou and provides suggestions for the maintenance of Suzhou dialect. The multilingualism in Suzhou is a new phenomenon of the 21st century, and has led to different personal attitudes towards language use and language choice. The right balance among the three, Suzhou dialect as the local language, Mandarin as the national language and English as the global language, is worth researching for long-term harmonious development. Keywords: Mandarin, Suzhou dialect, English, multilingualism, Suzhou