With the rapid development of highthroughput sequencing technology, more and more lncRNAs(Long noncoding RNA) which have biological functions were found in plants. lncRNAs are important noncoding RNA longer than 200 nucleotides. The researches on the function and mechanism of lncRNAs were more deeply in animals so far, not only in epigenetic level, transcription and posttranscription, but also playing important roles in wide ranges of biological processes such as genomic imprinting, chromatin remodeling, transcriptional activation. Compared to animals, some studies have to do with lncRNAs in plants, but the research of lncRNAs in plants is a little backward due to the lack of effective technologies and methods. Therefore, based on the latest advances on lncRNA recently, we reviewed the origin, structural characteristics, classification, molecular mechanism and function, which providing a guide for further study of function and molecular mechanism of lncRNAs in plants.