In the context of the Cold War, how PRC, a party-state in the socialist bloc, got along with France, a nation in the capitalist bloc? And what roles the PCF and French Maoists played between two countries? This thesis presents the ideological and realistic elements in Sino-French relations from 1949 to 1969.At first, these two countries were opposed in the Indochinese War and the Korea War. The official exchanges were broken. The PCF became the main bridge linking the two countries by its enterprises or associations, like the Association of Franco-Chinese Friendship.After the Geneva Conference, the bilateral relationship improved and some communication channels were created. But the American foreign policies and the Taiwan issue were still barriers. In this period, the PCF and its mass organizations also played important roles in the Sino-French relations. And the Chinese government appreciated the information and suggestions provided by the PCF. But the French government was alert to the ideological or political elements in the activities.In 1958, Charles de Gaulle returned to power, but he did not choose to recognize China immediately. And China adopted an indifferent attitude towards his government because of the ideological problems. Following the deterioration of relations between the PCF and the PCC and the resolution of the Algerian problems, the ideological roles that prevented the restoration of Sino-French relations were weakening.Although the bilateral relationships developed quickly after the establishment of Sino-French relations, the difficulties still remained. The Cultural Revolution and May 68 had a negative impact on their relations. Until the autumn 1968, the attitudes of the Chinese leadership toward France returned to normal.To sum up, the ideological elements in Sino-French relationship always exist. But realistic interests became more and more important and encouraged the two countries to improve their relations. A peaceful coexistence is a consensus for both China and France.