党的先进性和纯洁性都是马克思主义政党的本质属性,在思想内涵、实践机制与检验标准上,二者都有一定的关联性。党的纯洁性是党的先进性的必要条件、必然要求与应有之义,纯洁性是先进性的重要体现与基本保障,加强纯洁性建设是新时期保持与发展党的先进性的突破口与现实抓手。但二者是属于不同层面的两个概念,存在明显差异。比较而言,党的先进性属于“上位”概念,具有根本性,党的纯洁性属于“下位概念”;党的先进性建设需要从“党的领导、党的建设、社会主义建设”相统一的“大党建”角度来认识,党的纯洁性建设需要从党的自身建设“小党建”角度准确把握。党的先进性和纯洁性可以相提并论,但不能等量齐观,把纯洁性建设无限拔高则会降低纯洁性建设的针对性与有效性。 Both the advanced nature and the pureness of the Party are the essential attributes of Marxist political parties. Both of them have certain relevance in terms of ideological connotation, practical mechanism and testing standards. The purity of the party is a necessary condition for the advanced nature of the party. It requires and has its due meaning. Purity is an important manifestation and basic guarantee of its advanced nature. Strengthening the construction of purity is a breakthrough point in maintaining and developing the advanced nature of the party in the new era. Realistic starters. However, the two concepts belong to two different levels and there are obvious differences. In comparison, the advanced nature of the party belongs to the concept of “superiority”, which is fundamental. The purity of the party belongs to the concept of “subordinate position.” The building of the advanced nature of the party requires from “the party’s leadership, party building, and society To understand from the perspective of ”building a unified party“ and ”building a large party“ of ”socialist construction“, the construction of the party’s purity needs to be accurately grasped from the perspective of the party’s own building and ”small party building." The advanced nature and the purity of the party can be compared in the same breath, but they can not be treated in the same quantity and the infinity in the construction of purity will reduce the pertinence and effectiveness of the construction of purity.