中国共产党成立之初,对党的宣传工作就相当的审慎和重视。众所周知,蔡和森是中国共产党的早期重要领导人之一,他对中国革命做出了重大的贡献。但是在中共二大召开之前,蔡和森刚刚留法归国,对中国国内的情势并不算最为熟悉,并且也并非中共一大代表,他何以在当时人才济济的党员队伍中脱颖而出,在中共二大上不仅当选为中央执行委员会委员,并且负责宣传工作呢?本文基于中共二大前我党宣传工作重心的转变,从内外因两个层面,探析蔡和森何 Since the founding of the Chinese Communist Party, the propaganda work of the party has been quite cautious and valued. As we all know, Cai Hesen is one of the important early leaders of the Chinese Communist Party and made a significant contribution to the Chinese revolution. However, prior to the Second Congress of the CCP, Cai Hesen just returned from France and was not familiar with the domestic situation in China. Nor was it the first major representative of the CCP. Why did he emerge from the talented party members at that time? Not only was elected a member of the Central Executive Committee, and is responsible for the propaganda work? Based on the transformation of the CPC Central Committee’s propaganda work center, from both internal and external factors,