As an important part of soil minerals and earth sediments,vernadite(δ-MnO₂) have attracted much attention because of its super-strong enrichment of many metal ions in soil. δ-MnO₂ enriched metal ions migrate and transform in soil environment, with the risk of secondary pollution of metal elements. Therefore, it is imperative to explore δ-MnO₂ transformation process and their interaction with metal elements. This paper briefly introduces the properties of δ-MnO₂, reviews the structural transformation of δ-MnO₂ and their influential factors, the interaction of δ-MnO₂ with heavy metal ions and the growth mechanism of manganese oxide crystals, and finally puts forward the research focus and direction of the prevention and control of secondary pollution of metal elements in soil caused by δ-MnO₂ transformation process.