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Myocardial infarction is the most common cause of heart failure, and myocardial remodeling can occur after infarction, thus contributing to the progression of heart failure. The occurrence of post-infarction ventricular remodeling is closely related to m6 A methylation. m6 A methylation is a reversible and highly dynamic process. This process is mainly mediated by m6 A methylation positive and negative regulatory enzymes and is involved in the occurrence of post-infarction myocardial remodeling through mechanisms such as cellular autophagy. This article mainly reviews relevant literature in recent years. Firstly, a brief introduction is given to m6 A methylation, followed by an introduction to the role of m6 A methylase in regulating myocardial remodeling. Finally, a summary analysis is conducted on the mechanism of m6 A methylation in regulating myocardial remodeling from the perspectives of autophagy, inflammation, cell apoptosis, calcium ion homeostasis, extracellular matrix remodeling, and ferroptosis. The feasibility of using m6 A methylation serological detection as a diagnostic tool for myocardial remodeling after myocardial infarction is discussed, in order to provide reference for related research. [ABSTRACT FROM AUTHOR]