Cinnamaldehyde is a bioactive phytochemical isolated from traditional Chinese medicine such as Cinnamomi Cortex,which is considered to have extensive medical effects.Based on previous research work,this article summarizes the research progress of cinnamaldehyde in recent years in the fields of nerve damage,bone damage,anticancer,antibacterial,and so on,and finds that cinnamaldehyde can exert these effects by acting on various signal pathways.This article also puts forward suggestions for the urgent problems to be solved,with a view to providing reference for the clinical safe use of cinnamaldehyde and the development of new drugs.