空间核动力因其突出优势成为美俄等大国打造强大天基能力、抢占太空战略优势的关键核心。近期，美国政府陆续发布关于空间核动力发展的战略和政策，以确保其在太空竞争博弈中保持领先。为准确把握美国空间核动力发展的重点和目标，对美国空间核动力的进展进行了综述，对其发展态势进行了解析，得出以下结论：美国正从国家层面加快推进太空军事化的战略部署，把发展空间核动力上升为国家战略，系统完整地提出了有关政策、目标、原则、路线图等，并强调建立高层次的组织协调机制确保战略政策高效实施。美国空间核动力将基于其雄厚的技术基础取得快速发展，为美国太空军建设和发展提供动力。
Because of its outstanding advantages, in major countries such as the United States (U.S.) and Russia, the space nuclear power becomes a key to building strong space-based capabilities and taking strategic advantages in space. Recently, the U.S. government has successively formulated strategies and policies on the development of the space nuclear power to ensure its leading position in the space competition. In order to accurately identify focuses and goals of the U.S. space nuclear power, this paper reviews the latest progress in the space nuclear power in the U.S. and analyzes the development trend to help the decision making of the space nuclear power in China. It is shown that the U.S. is accelerating the strategic deployment of the space militarization at the national level and is developing the space nuclear power as a national strategy. For the first time, the U.S. puts forward systematic and comprehensive policies, goals, principles, roadmaps for developing the space nuclear power, to establish a high-level organization and a coordination mechanism to ensure the effective implementation of relevant strategies and policies. The U.S. space nuclear power will achieve a rapid development based on its solid technical foundation and will provide a disruptive and powerful driving force for the construction and development of the U.S.
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