[Purpose/significance] Data element drives the development of the digital economy and national innova⁃tion, and mastering the innovation process of the public data innovation ecosystem is of great significance for continu⁃ously and fully releasing the value of public data element. [Method/process] Based on the perspective of innovation ecosystem and data industry, this paper puts forward the concept of public data innovation ecosystem, analyzes the con⁃notation, components, characteristics, and innovation process of the system, and selects relevant cases to analyze its in⁃novation practice. [Result/conclusion] The public data innovation ecosystem consists of public data, innovation clus⁃ters and the innovation environment in which they are located, and operates in each node of the data industry chain, and the three elements synergize with each other to promote innovation in the allocation of public data resources, product in⁃novation , organizational innovation, technological innovation and market innovation.