20世纪20年代形成的第一次国共合作,是在中国的阶级矛盾和民族矛盾相对激化,中国人民为了寻求民族解放的时代背景下形成的,它开创了中国民主革命的新局面,促进了国共两党的发展和社会的进步。它是各方面因素共同作用的结果。随着合作的进展深化,这就会不可避免地出现矛盾,这与国共两党阶级本质的根本区别有关系,本文从第一次国共合作的国内外形势以及合作中出现的三对矛盾,来分析国共合作破裂的原因,合作中的三对矛盾决定了第一次国共合作终将破裂。 The first cooperation between the KMT and the CCP in the 1920s was formed under the background of the intensification of the class contradictions and ethnic conflicts in China and the Chinese people’s search for national liberation. It created a new situation in the Chinese democratic revolution and promoted the success of the Kuomintang The development of both parties and social progress. It is the result of a combination of factors. With the deepening of cooperation, this will inevitably lead to contradictions. This is in line with the fundamental difference between the class nature of the KMT and the CPC. From the first domestic and international co-operation between the Kuomintang and the Communist Party (CCP) and the three contradictions in the cooperation, Analysis of the reasons for the breakdown of cooperation between the KMT and the CPPCC, the three pairs of contradictions in the cooperation decided the first cooperation between KMT and CCP will eventually burst.