Xi Jinping's significant discourse on the Party's self?reform serves as the fundamental guideline for advancing the Party's self?reform in the new era， which contains a variety of scientific thinking methods， mainly including such thinking methods as systematicity， innovation， rule of law， bottom line， and limitation. Comprehensively mastering these thinking methods is a vital initiative for us to thoroughly implement and study Xi Jinping's Thought on Socialism with Chinese Characteristics in a New Era to push the Party's self?reform further.