The self-reform of the Communist Party of China embodies the dialectical unity of understanding and practice, profoundly revealing the essential attributes of a Marxist party. To fully grasp the theoretical core of the Party's self-reform, it is indispensable to analyze its basic elements. Mutuality, as an important feature of self-reform, not only reflects the comprehensiveness and systematic nature of self-reform but also demonstrates its innovative and contemporary nature. Understanding the origins of research into the mutual characteristics of self-reform requires delving into the relevant discussions of traditional classic Marxist authors for theoretical foundations of mutuality, meticulously outlining the academic studies on the mutuality of self-reform, and elaborating on the mutual characteristics of self-reform in an academic manner. This reveals that the Party's self-reform is not an isolated, static practice, but is constantly in a state of interaction. A thorough analysis of the reciprocal characteristics embedded in self-reform, including mutual inspiration, interdependence, and integration, not only provides a clear understanding of the significant value of the Party's self-reform but also offers methodological insights for an in-depth study of General Secretary Xi Jinping's important thoughts on the Party's self-reform. Specifically, reciprocity is an intrinsic spiritual drive, reflecting the mutual linkage and motivation between individuals; interdependence is an efficient and stable operating mode, reflecting the mutual reliance and support between various domains; integration is a continuously optimized dynamic system, reflecting the adaptive nature of the times and societal demands.