The open government movement has promoted the open sharing of government data around the world, and how to make better use of government open data to promote political democracy and social progress has become an urgent issue for discussion. Bibliometric analysis was conducted to explore the research context, cooperation, research hotspots and development trends of domestic and foreign scholars on government data openness since 2000. CiteSpace knowledge graph was used to conduct a comparative study on government data openness at home and abroad. It is found that foreign government data openness has better integration of different disciplines and a higher degree of data utilization, and has begun to try to apply artificial intelligence to the government data openness platform. Given the domestic and foreign comparison results, the following suggestions are put forward for the opening of domestic government data: strengthen the integration with artificial intelligence, strengthen the efficiency of data utilization and integration with other discipline systems, and finally sink from the government to the citizen side.