Theoretical foundations of limitation of self-admission are on the following four aspects: the scope of application of the doctrine of debate is limited, the parties 'disposal rights are relative, constrain of the obligation of truthfulness, and necessity of judges' ex officio. 自认限制的理论基础在于辩论主义适用范围的有限性、当事人处分权的相对性、诉讼真实义务的制约性和法官职权探知的必要性。