2023年，太平洋岛国的外交形势紧紧围绕内部团结和大国博弈两条主线。基里巴斯重返太平洋岛国论坛，修复了南太平洋地区主义的裂痕，内部团结催生了第52届太平洋岛国论坛领导人峰会的丰富成果，但也受到日本核污染水排海等问题考验。美拉尼西亚先锋集团在地区外交活动中发挥着引领作用，巴布亚新几内亚和斐济两个大国不断扩大域内外影响力。日益机制化的中国和太平洋岛国合作不断“开花结果”，但美国在全面对华竞争的战略指导下，继续将南太视作遏制中国影响力的“战场”。随着亚洲、欧洲大国加大对南太地区事务的介入力度，南太地区进入大国博弈常态化新阶段。
In 2023，the diplomatic situation among the Pacific island countries is mainly centered upon two themes，internal unity and great power games. Kiribati’s return to the Pacific Islands Forum has repaired the rift in South Pacific regionalism，which has given rise to the rich outcome of the 52nd PIF Leaders’ Summit. South Pacific Regionalism has also been tested by issues such as Japan’s nuclear-contaminated water discharge into the sea. The Melanesian Spearhead Group played a leading role in regional diplomatic activities. The two MSG major powers Papua New Guinea and Fiji have continued to increase their influence in the region and beyond. The increasingly institutionalized cooperation between China and the Pacific islands countries continued to blossom，while the United States，guided by its strategy of comprehensive competition against China，continues to exploit the South Pacific as a battleground for containing China’s influence. As Asian and European powers significantly increased their engagement in the Pacific Islands，major power rivalry in the south pacific became more and more normalized，setting a tone for regional diplomatic activities.
| Keywords： | South Pacific RegionalismMelanesian Spearhead Group（MSG）China-Pacific Islands Countries CooperationMajor Power Rivalry |
