The latest pharmaceutic research progress of five benzodiazepines,such as diazepam,clonazepam,lorazepam,midazolam,and alprazolam,which have been extensively used in clinical,was summarized in this article,and the research and application of new dosage forms of these drugs were introduced.Based on this,the authors look into the developing tendency in the future and provide a thought for the research and development in BZ.