This paper aims to offer suggestions about formulating and implementing policies of open government data. American open government policies and acts are analyzed in three aspects: organizations and positions, policies, and acts. And then what can be learned from their experience is summarized and suggestions are put forward to perfect our own policies. The United States is one of the first countries that open its government data. After the publication of Open Government Data Initiative in 2009, the U.S. Government has issued several policies and acts to open government data. These actions have laid a solid foundation for the leading position in open government data for U.S. This paper will give suggestions about making policies, establishing sharing platform, implementing policies, and data security.