Sustainable development means meeting current needs without destroying future potentials. Since the introduction of environmental education, people have become more aware of the consequences of their actions and possible prevention and solutions. Based on the review of 7 papers that studied environmental education in preschools, focusing on methodology, teacher training, and government policy. The main objectives are to identify implementation problems of environmental education and suggest better ways of teaching and implementing environmental education. NVivo software was used to analyze emerging themes in the selected research papers that focus on environmental education in preschools, using thematic analysis to analyse the data. As a result, several themes concerning preschool stakeholders, training, curriculum, and policy were identified. The main result showed that few preschools that implemented environmental education with the government's support, a nature-based curriculum, and trained teachers had a more favourable impact on the environmental awareness of both teachers and children. This has led to developing of a Pro-Environmental Behavioural framework for Environmental Education in Preschools.