The focus of this research is to analyze the relations among three major states America India and China. Increasing Indo-US relations have left spill over implications on China in geostrategic sphere. Since the end of cold war, the dramatic strategic change occurred in the trilateral relations among America India and China. During the cold war period Indian tilt was towards Soviet Union both the states remained strategic allies. The soviet defeat in Cold War created a strategic gape in American foreign policy to filling that strategic gape US deemed India as reliable partner and China as strategic competitor. For Countering China's economic, political and strategic influence America have established strategic relations with India. The dawn of 21 st century gave birth to shocking event of 9/11 that has changed the land scape of geo-political and geostrategic relations among the states; simultaneously Asian continent became singular focus of American policy makers for two reasons; one war on terror and other China's economic power. Analytical approach has been adopted and descriptive method is used in the research to achieve research objectives.