[Purpose/significance] By analyzing international organizations' scientific data open sharing policies,this paper can provide references for the formulation of domestic related policies and the promotion of scientific data open sharing. [Methods/process] According to the content analysis and thematic analysis of scientific data open sharing policy texts of eight international organizations such as OECD,UNESCO,Science International,European Commission,the specific contents and the characteristics of the policies are analyzed. [Result/conclusion] It is found that the international organizations' scientific data open sharing policies not only pay attention to the value of scientific data open sharing,but also to the high quality,interoperability and intellectual property protection of scientific data,and still emphasize the responsibilities of stakeholders. The statement of the importance of OA(Open Access),stakeholder responsibility,data quality,data interoperability,data utility evaluation and intellectual property protection are indispensable contents of the international organizations' scientific data open sharing policies. China should establish a sound scientific data open sharing policy system.