Abstract：The CPC established a distinctive image of a Marxist party at the early stage, but implemented a closed-doorism policy.The CPC put forward the task of building a political party of the "proletarian masses" in the second Congress, which was a crucial step in the process of Leninism's Sinicization.But it was denied in the third Congress so that the CPC suffered setbacks in practice.Because of re-establish-ing the goal of building a party of the proletarian masses in the third Central Committee in May 1924 and the fourth Congress, the CPC achieved a great development.The new target at being bolshevized in October 1925 was a new exploration of its building objectives in this period.

Keyword：the CPC at the early stage;the masses of the party;being bolshevized;party building;