[Purpose/significance] The deep opening of government data indicates that China will enter the stage of open and utilization of government data based on user demand, high value and high quality. [Method/process] The pa⁃per adopts literature research and comparative research methods to explain and analyze the meaning, background, char⁃acteristics, and development strategies of deep openness of government data from the perspective of the phased develop⁃ment of open government data in China. [Result/conclusion] It is proposed to further promote the supply-side reform of open government data, actively explore the effective circulation mechanism of public data primary processing data factors, optimize the realization method of public data property rights structural separation and right allocation to pro⁃mote the strategy of deepening open government data in China.