美国自朝鲜第三次核试验以后，调整了对朝鲜的政策。以强有力的军事威慑和有前提的对话协商为原则持续对朝鲜施压，同时巩固与韩日的同盟关系，并试图联合中俄，形成对朝鲜的多层次遏制战略。“朝鲜不稳论”“朝鲜崩溃论”进一步阻碍了美朝关系的改善。另外，朝鲜半岛核问题的解决已成为2013年以来中美领导人重点讨论的话题，双方虽然都形成了朝鲜半岛无核化的共识，但在具体实施方案等问题上仍然因双方认知的差异及协调不足而蹒跚不前。
The US has adjusted its policy towards North Korea since the third nuclear test in February 2013. With a strong military deterrence and dialogue with pre-condition，the US continues to put pressure on North Korea by consolidating the alliance with South Korea and Japan and attempting to take cooperation with Russia and China in order to form a multi-level strategy against North Korea. “The Collapse of North Korea”and“Instability in North Korea”have risen again in US，further hindering the improvement of US-DPRK relations. Moreover，the denuclearization in the Korean Peninsula has become a key topic between China and United States since 2013. Both sides have formed a consensus on the denuclearization of the Korean Peninsula，but the specific plans haven’t been in progress due to the difference of strategic orientation and a lack of coordination.
| Keywords： | The North Korea Nuclear CrisisThe Sino-US RelationshipThe US-ROK AllianceThe Six-Party Talks |
