对于《汪陈联合宣言》,史学界是一致否定的.但对于陈独秀为何要与汪精卫发表《联合宣言》却无人探寻.为此,笔者通过查阅资料及文章,试图通过陈独秀对中国社会各阶级特别是对工人阶级和资产阶级的错误分析、受共产国际及其代表的影响、对蒋介石集团背叛革命估计不足、为了在舆论上压制蒋介石、受汪精卫蒙蔽五个方面的论述以求解答这一疑问. For the “Wang Chen Declaration”, historians are unanimously denied .However, Chen Duxiu why and Wang Jingwei issued a “Joint Declaration” but no one to explore.To this end, the author through access to information and articles, trying to Chen Duxiu on all social classes in China Especially the erroneous analysis of the working class and the bourgeoisie, under the influence of the Comintern and its representatives, underestimated the betrayal of the revolution by the Chiang Kai-shek clique, and five-quartet discreditations by Chiang Kai-shek in order to answer this question .