In recent years, the development of open science has accelerated. It is of reference significance for China to grasp the new progress of international policy. This study combs the development of major open science policies in the world. According to the survey, UNESCO has established a common definition, values, principles and core areas for open science for the first time through the Open Science Recommendation, which is a sign of international consensus on the open science policy. With the "Horizon 2020" plan as the core, the EU has formed a complete open science policy system. Britain and the United States realized the policy revolution from "request" to "require" and then to " mandatory ". The survey found that open science has evolved into an international public policy; Countries are forming competitive open science standards; The international open science policy has been widely adopted, but its development is still uneven. China should promote the development of open science policy based on high level of self-reliance; We should actively participate in the development process of international open science through resource advantages; Build a credible and high-level open science and give full play to the social functions of science; Improve the co-construction mechanism of multiple stakeholders, prevent the monopoly of new resources, and ensure the security of open data.