2018年二十國集團峯喺11月30號喺阿根廷首都布宜諾斯艾利斯開幕，開幕禮由東道主阿根廷總統馬克里主持。馬克里喺開幕禮上致辭，呼籲各國繼續支持多邊貿易主義， 馬克里明白國同國之間係有分歧 ，但希望呢個峯會可以幫到大家求同存異，促進對話 。馬克里希望今次峯會能夠為世界未來十年嘅共識奠定基礎。
The 2018 G20 Summit opened in Buenos Aires, the capital of Argentina, on November 30, and the opening ceremony was hosted by the host country, President Macri of Argentina. In his speech at the opening ceremony, Macri called on all countries to continue to support multilateral trade, Macri understands that there are differences between countries, but hopes that this summit can help everyone to seek common ground while reserving differences and promote dialogue. Macri hopes that the summit will lay the groundwork for world consensus over the next decade.