在過去的幾年，因為巴西持續成長為全球大國之一，中國在巴西的經濟投資已越發普遍。這樣的發展趨勢引出了一些重要的課題，不只是中國及美國對巴西未來的外交政策該採取什麼走向，以及美國對於中國成長表現和其在蓬勃發展經濟區域中的影響該如何回應。中西貿易在2010年達到歷史新高，現今，中國擠下美國躍升為南美主要貿易夥伴。即使美國在美洲有著主導性的地位，但南美區域已不再受美國全權干涉，我將在論文中分析現今中國及巴西的關係、美國和巴西的關係，以及巴西與中國的貿易成長將如何影響巴西與美國的外交政策及經濟關係。此外，我也會分析中國漸趨增加的影響力和地位將如何影響中西兩國之間的關係。 In the past few years, China’s economic investment in Brazil has become more prevalent as Brazil continues to grow as a global power. This development raises important questions regarding not only China’s and the United States future foreign policy toward Brazil, but the United States response to China’s growing presence and influence in the region’s largest rising economy. Sino-Brazilian trade reached record levels in 2010, and China has now taken the place of the top trading partner with the South American giant, a place formerly held by the United States. Even though the United States remains the dominant power in the Americas, the region is no longer its exclusive sphere of influence. This paper will attempt to analyze present and future relations between China and Brazil, as well as Brazil and the United States, and whether Brazil’s growing partnership with China will affect its political and economic relation with the United States. Also, it will analyze if whether China’s growing influence and presence in America’s backyard has any impact in the Sino-American relations.