Long non-coding RNAs (lncRNAs) are a kind of transcripts which are longer than 200nt and have not protein-coding ability due to the lack of an open reading frame. However, lncRNAs can be involved in tumorigenesis and progression in various ways at the transcriptional and post-transcriptional levels. Bladder cancer associated transcript 1 (BLACAT1) as a lncRNA located on human chromosome 1q32.1, is ectopic expression in various tumors (bladder cancer, gastric malignant tumor, lung carcinoma, et al) and can regulate tumor cell proliferation, anti-apoptosis, invasion and metastasis by different mechanisms leading to occurrence and development of tumors. In this review, we summarized current studies of the functions and mechanisms of BLACAT1 in malignant tumors. Key words: RNA, long noncoding; Bladder cancer associated transcript 1; Neoplasms; Therapeutic target; Review