DPRK 's sixth nuclear test has changed the nature of North Korea nuclear issue. North Korea's foreign trade will be seriously affected after the UN Security Council Resolution 2375 being well implemented，especially over 90% of North Korea's exports will be restricted. There is no doubt that the sanctions will deeply affect the North Korea’s “survival” and “development”. But the sanctions、pressing and isolation can’t totally solve the North Korea nuclear issue. For U.S., The DPRK nuclear issue has touched the U.S. strategic red line. So when he takes office, president Trump abandons the Obama administration's “strategic patience policy” and states through “maximum pressure”, even consider “preemptive strike” to solve the North Korea nuclear issue. In order to solve the North Korea nuclear issue, China has announce the “three adhere to”, but there are evident conflicts on the approaches to denuclearized North Korea With all countries. Therefore, china should narrow the gap between goal and the approaches. China should adhere to the framework of “sanctions + talks” and turn the pressure of sanctions into a driving force for peace talks and strengthen strategic cooperation with Russia and South Korea. And on the other hand, to persuade the United States to reform its strategy of freezing North Korea's nuclear program so as to break the deepening vicious circle