Abstract: Zero-carbon park is one of the key points in the practice of carbon neutralization and emission peak. However, in the context of the new power system, the electric energy supply of the park is characterized by the high integration of water, electricity, gas and heat, strong uncertainty of source-grid-load-storage, and complex and diverse primary and secondary topologies, which makes it difficult for the existing planning and design technologies to meet the application requirements. To this end, this paper discusses the current status, key technologies and future development trends of the optimal planning and design of zero-carbon parks. Firstly, the current status of research on zero-carbon parks and their planning and design technologies is explained from the perspective of energy interconnection. Secondly, the key technologies for optimal planning of zero-carbon parks, including energy-transportation system coupling, multi-energy complementarity, energy gradient utilization, demand response, and progressive planning, are summarized and explained. Finally, the future development trend of park planning is analyzed in terms of sharing concept, digital twin and cloud energy storage, and the technical challenges and research directions of park planning are indicated from the perspectives of concept application, disciplinary intersection, information integration and situational awareness, in order to provide stronger technical support for the development of zero-carbon parks for energy internet in China.