Abstract: Micro-encapsulated / nano-encapsulated phase change materials are novel composite phase change materials, which are prepared by micro-encapsulation and nano-encapsulation technology. In this paper, the methods and the recent progress of preparing micro-encapsulated /nano-encapsulated phase change materials are reviewed, and their advantages and disadvantages are analyzed. Additionally, the application fields and prospects of the micro-encapsulated / nano-encapsulated phase change materials are introduced.