Abstract: Protein is the undertaker and embodiment of life activities.Therefore，it was once thought that only RNA， which encodes proteins，could have important functions.However，with the development of high-throughput sequencing and the improvement of bioinformatics in recent years，a large number of non-coding RNA(ncRNAs) has been found.Plant non-coding RNA is a kind of RNA that does not encode proteins in transcriptome and plays an important role in regulating plant life activities.The classification and biological functions of plant ncRNAs were summarized in this study.The production mechanism，molecular mechanism and related functions of stress response of several main ncRNAs，such as microRNAs (miRNAs)，lncRNAs (long non-coding RNAs)，circRNAs(circular RNAs) were described in this paper.It provides some valuable theoretical basis and reference information for the follow-up study of plant ncRNAs.