Early childhood education (ECE) and development is internationally recognised as important to child health and wellbeing and to enabling children to become healthy productive adults. This paper analyses Australian ECE policy current in 2019. It uses the institutional framework of ideas, actors and institutions to determine the extent to which ECE policy recognises and acts on social determinants of health and health equity. We found that the policies supported integrated approaches, intersectoral collaboration and partnerships with parents and families. Evidence was important in formulating the ideas underpinning ECE policy. ECE was widely recognised as a social determinant of health, and the impacts of other social determinants of health and health equity were acknowledged. The ECE policies tended to be future-focused and not respond to social determinants that influence children and their families in the present time. The policies lacked strategies to address social determinants, or to engage with other sectors for this purpose. While some policies focused on breaking the cycle of disadvantage, they did not explore potential policy responses to pathways from intergenerational disadvantage to reduce poverty. Despite this, Australian ECE policy has achieved significant coherence, with shared understandings of the purpose and benefits of ECE.