Salivary adenoid cystic carcinoma(SACC) is one of the most malignant tumors in salivary adenoid tissue with a feature of perineural invasion, lung metastasis, which grows slowly but easily trends to invasion and has a poor prognosis. In recent years domestic and foreign scholars have done a lot of researches about epithelial-mesenchymal transition(EMT) in SACC, for revealing the mechanism of its development, invasion and metastasis and exposing new therapy. This review elucidated the EMT mechanism in SACC.