•These posthuman theories can transform the paradigms of educators in early childhood education.•This review covers the posthuman lens of literacy, that not highlighted in previous research.•The literacy practices are indivisible and give rise to the configuration of new narratives. The posthumanist perspective implies a change in the consideration of the non-human and more-than-human in literacy practices from an ethical-onto-epistemological approach. This research is a systematic review that aims to understand how literacy studies with a posthuman lens host literacy practices at a young age from the relational-material language model, in a broad domain where the human, more-than-human and non-human are connected. This is developed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) method, with a selection of 15 research articles from the WOS and Scopus databases. This review highlights the (re)conceptualisation of children's literacy practices from the understanding of the role of the human, non-human and more-than-human, that materials and discourse and literacy practices are indivisible and give rise to the configuration of new narratives - integrating movement, sound, digital, space, time, improvisation, sensations and affections, etc. - and the challenge to the humanist assumptions of literacy practices.