As an important part of party building, the party’s style of work is an important reflection of the party’s nature and purpose. During the Central Soviet Area, Mao Zedong continued to carry out self-revolution in the spirit of self-sublation and self-criticism on the basis of inheriting and developing the Marxist-Leninist theory of party building, and maintained the advanced nature of the Marxist party. Although Mao Zedong did not put forward the formal conclusion of the “three styles” and the “two musts” in the form of a complete text, he proposed to the whole party the strengthening of the party from three main aspects: ideological style, work style and life style. The idea of strengthening the Party’s style of work has enriched the Communist Party of China’s experience in theory and practice. This has important implications for persisting in promoting comprehensive and strict governance of the party in the new era, promoting the party’s self-revolution, and building an advanced Marxist political party.