This paper, based on the investigation of the academic and cultural development of Buddhism history and thoughts during the period of the Six Dynasties, explored the quotation of inner and outer classics by Xiao Ziliang of the Southern Qi Dynasty in his Jingzhuzi and presented the characteristics and positioning of the repentance dharma during the development of Buddhism through his interpretation of confession. As the core of the group of Xi-di scribes, Xiao Ziliang was the mainstay of the development of Buddhism during the period of the Yongming period of the Qi and had the same “voice” as Buddhists, which was reflected in his composition through “handwritten classics” regarded as his “methodology” of the establishment of his theory of repentance dharma. In terms of content, “Bodhisattva Precepts” is the highest guide principle, which can be considered as “subjectivity theory”. Through the integration of various aspects, “Mahāyāna Upavasatha” was formed which could be appreciated by Buddhists and the public. As an important source of Repentance dharma for the later ages, under the guide of the thought of Practices of Bodhisattva, Jingzhuzi, though without the record of sadhana drubtab, is a theory of the initial approach to become a Buddhist believer, responding to the needs of the practice of sadhana drubtab so as to contain the elements of the development of Repentance dharma. The description model of some mutual interpretation of Confucianism and Buddhism shows strong characteristic of engaged Buddhists, while the emphasis on sila dhamma and sadhana drubtab is compliant with the principle of “repentance according to commandment”. Some chapters particularly reflect the thinking of “repentance according to meditation” but adopt the moral requirement of cultivation of the body and mind in social circumstances as the condition of “sensed Buddha (Buddha’s figure)”. Besides, along the guide of relevant initial approach to become a Buddhist believer, some viewpoints in fact have contained the factors of the development of “Repentance by observing the true form of reality” by the later generations through the exploration and clarification of the structure of the body and mind of the practitioners with the sense of sin.