Abstract: Electrolytic flotation technology is a method to obtain microbubbles by electrolyzing water based on the principle of electrolytic cell. It is characterized by the small diameter of the bubble produced by electrolysis, and has the advantages in fine particle flotation and wastewater treatment. With the prominent resources characteristics of poor, fine and miscellaneous and the enhancement of green chemical industry, the research and application of fine particle flotation, metal ion treatment in wastewater and oil-water separation will be widely concerned. This paper summarized the research progress of electrolytic flotation technology in the separation of oil and water, removal of heavy metal ions, solid-liquid separation of metal, non-metal, coal and other fine-grained materials and waste water, in order to further study the electrolytic flotation method and lay a foundation for its popularization and application.