政党的阶级基础和群众基础是政党赖以生存和发展的依托。党的十六大报告在论述新时期如何加强和改进党的建设时,把“切实做好基层党建工作,增强党的阶级基础和扩大党的群众基础”①作为新时期党建的一个非常重要的内容。延安时期党在组织建设特别是扩大群众基础方面积累了丰富? The class basis and the mass foundation of political parties are the basis for the survival and development of political parties. When discussing how to strengthen and improve party building in the new period, the report at the 16th CPC Congress put “putting the party building in the grassroots level, enhancing the party’s class foundation and expanding the party’s mass foundation” ① as a very important part of party building in the new period content. During the Yan’an period, the party accumulated rich in organizational construction, especially expanding the mass base.