中共六届七中全会《关于若干历史问题决议》曾指出:各次“左”倾错误“都主张整个地反对资产阶级以至上层小资产阶级”,极力推行“左”倾关门主义的阶级政策。但长期以来,学术界对中共“左”倾关门主义阶级政策产生的理论根据及其与共产国际,尤其是与斯大林中国革命“三阶段”论之间的关系,却很少有人提及。本文就这一问题试作探讨。笔者认为,斯大林“三阶段”论是中共“左”倾关门主义 The “Resolution on Certain Historical Issues” of the 7th Plenary Session of the 6th Central Committee of the CPC once pointed out: All the “leftist” mistakes “all stand for opposing the bourgeoisie as a whole and the petty bourgeoisie as a whole” and pushing for a “leftist” anti-secessionist class policy. For a long time, however, there has been little talk in the academic circles about the theoretical basis for the CPC’s “Leftist” -offist-class policy and its relationship with the Comintern, especially the “three-stage” theory of Stalin’s Chinese revolution. This article attempts to explore this issue. In my opinion, Stalin’s “three stages” theory is the CCP’s “leftist” inclinations