The epitranscriptomic mark -methyladenosine (mA) is the most common type of messenger RNA (mRNA) post-transcriptional modification in eukaryotes. With the discovery of the demethylase FTO (FAT MASS AND OBESITY-ASSOCIATED PROTEIN) in , this modification has been proven to be dynamically reversible. With technological advances, research on mA modification in plants also rapidly developed. mA modification is widely distributed in plants, which is usually enriched near the stop codons and 3'-UTRs, and has conserved modification sequences. The related proteins of mA modification mainly consist of three components: methyltransferases (writers), demethylases (erasers), and reading proteins (readers). mA modification mainly regulates the growth and development of plants by modulating the RNA metabolic processes and playing an important role in their responses to environmental signals. In this review, we briefly outline the development of mA modification detection techniques; comparatively analyze the distribution characteristics of mA in plants; summarize the methyltransferases, demethylases, and binding proteins related to mA; elaborate on how mA modification functions in plant growth, development, and response to environmental signals; and provide a summary and outlook on the research of mA in plants.