Energy Internet is an important way to achieve sustainable development of energy and ecological optimization.As the basic physical carrier of Energy Internet, combined cooling, heating and power micro-grid is the key to explore the efficient and clean transformation of energy utilization with reasonable and effective planning.Firstly, the multi-energy coupling structure framework and equipment types are summarized.Secondly,the scheduling strategy about the random problem solving and renewable energy consumption is emphatically and detailedly summarized from the perspective of economy efficiency and environmental protection according to the planning optimization factors.Then,the planning target model and algorithm are discussed.Finally,the future research directions of combined cooling, heating and power micro grid are prospected based on present research status.