Recent developments in globalization have led to a renewed interest in cultural dimensions. Individualism and collectivism, sug-gested as the most significant concepts of cultural dimensions, have been theoretically analyzed by many scholars and linked to fields like management, cross-culture communication, etc. This paper mainly explores how individualism-collectivism influence personal relation-ships of Chinese and Americans, then analyzes the differences under the influences of cultures. In accordance with the fact analysis, this paper provides valuable reference for cross-culture learners to better understand how peoples in two countries deal with their relationships, and for those who need to deal with international interaction to enhance cooperation while reduce the cultural conflicts.