Abstract: MicroRNAs （miRNAs） are recently discovered， small singlestrand RNA molecules that can regulate gene expression， and the abnormal expression or mutation in miRNAs are considered to be associated with the initiation and progression of a variety of tumors. It has been identified that miRNAs play a crucial role in triple negative breast cancer， providing a novel possible therapeutic application. In this review， we will provide an overview of the application of miRNAs in triple negative breast cancer.