Because of sedentary life style,plants can not avoid bad environmental stimulus,hence need to defense and avoid environmental stress through their own defense mechanism.Epigenetic plays an important role in regulating plans response to environmental stress.This paper summarizes the current research status of epigenetic variations of plants induced by abiotic stress,including DNA methylation,histone modification,chromatin remodeling and noncoding RNA.We are expecting to exploit epigenetic changes improve the stress resistance of plants.