Taking America’s implementing the Asia-Paciifc rebalancing strategy and China’s building the Silk Road Belt as a backdrop, this research generalizes the basic concepts of geopolitics, geo-economy and geo-strategy, and then reviews the basic theories of geopolitics and its progress. Furthermore, based on the results of analyzing the features of changes of East Asia geopolitical environment, the paper summarizes the development trends of geopolitical environment of Sino-Mongolia and Sino-Russia, and considers that the geopolitical pattern and order of the South China Sea has been changed deeply with the strong involvement of USA. One of the most important changes is that China’s interests are suffering stern challenge from Japan, Vietnam, Philippines and other countries. Afterwards, taking the energy market as an example, this research analyzes the impact of geopolitical changes of East Asia on the regional resources market. For China, the strategic conception of building the Silk Road Economic Belt is a countermeasure to counterbalance the adverse changing. At the same time, Russia was sanctioned by western countries and turned their eyes to Asia. So the stern geopolitical environment of both countries provides a good opportunity for China-Russia economic and trade cooperation. Because of the similar geopolitical situation and economic complementary, the energy cooperation between China and Russia is expected to be further enhanced in the future. Although Mongolia’s economy relies heavily on China, its geopolitical strategic demand and strategic target have changed profoundly since the United States returns to Asia. The diplomatic priority of Mongolia is to strengthen exchanges with “the third neighbor” and to counterbalance its two neighbors’ inlfuences. Though the Sino-Mongolia geopolitical relations are mainly positive, America’s involvement increased the uncertainty of Sino-Mongolia resources cooperation. For Japan and Korea being America’s allies, the harsh regional geopolitical environment wil decrease their share of resources market in northeast Asia in the future.%以美国实施亚太再平衡战略和中国推进丝绸之路经济带建设为背景，本研究总结了地缘政治、地缘经济、地缘战略的基本概念和相互之间的关系，并回顾了基本的地缘政治理论及其研究进展。继而在概括东亚地缘政治环境变化特点的基础上，论文总结了中蒙之间、中俄之间地缘政治关系发展趋势，认为美国亚太再平衡战略打破了亚太地缘力量平衡格局，中国利益受到来自日本、越南、菲律宾等国的强力挑战。随后，论文以东北亚能源市场为例探讨了地缘环境变化对区域资源市场的影响。其中，对中国而言，建设丝绸之路经济带是应对地缘环境危机的策略；与此同时，俄罗斯在受到西方制裁后将眼光投向亚洲，加之中俄之间具有很强的经济互补性，双方的资源合作水平有望进一步提高；蒙古国经济上对中国依赖很大，美国重返亚洲之后，蒙古国调整了自己的地缘战略，企图借美国力量制衡中俄在蒙古国的影响力，虽然中蒙之间的地缘政治关系总体上是向好发展，但美国的介入增加了中蒙资源合作的不确定性；因日韩为美国盟友，中俄与美国的地缘利益冲突将减少其在东北亚资源市场上的份额；对朝鲜来说，因其经济总量很小，对区域资源市场影响不大。
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