[Purpose/significance] Promoting the opening and sharing of government data is an important support for the construction of digital government. With the accumulation of massive public data and the widening of data application scenarios, the relevant policies, regulations and rules are constantly evolving and improving with the full implementation of government data open sharing. This paper explores the interactive relationship between the elements of government data open sharing policy and the evolution process of policy system.[Method/process] From the perspective of policy ecology, this paper takes 241 government data open sharing policies at the national level from 2000 to 2020 as research samples, and uses content analysis method to quantitatively analyze the three elements of the policy ecosystem:policy subject, policy process and policy environment. [Result/conclusion] It is found that the evolution process of China's government data open sharing policy ecosystem is consistent with the process of China's government digital trans?
formation, and the policy ecosystem is gradually tending to balance, but we still need to vigorously build a new mechanism for the benign interaction of policy elements.