International situation and global challenges have become more complex and severe from 2021 to 2022. Sino-US relations continue to be tense，and the comprehensive competition and even confrontation with China in the fields of politics，economy，military and science & technology have begun to take shape. Outside of Sino-US relations，the military conflict between Russia and Ukraine has brought a huge shock to the world. Global issues such as increasing regional instability，rising security risks，global food security，international energy security，and global climate change continue to bring challenges to international stability. Think tanks and research institutions in various countries have paid close attention and put forward their own analysis and recommendations. In order to track the latest research updates of top international think tanks on related issues and to gain a more comprehensive understanding of relevant hot issues，this article takes the top-ranked international think tanks in the “2020 Global Go To Think Tank Index Report” as the research objects，and compares the relevant research outcomes published by them in the past year.