As one of the emerging values of criminal procedure, procedural consultation has been paid more and more attention by academic and practical circles. In order to punish crimes better, protect human rights and improve the efficiency of legal proceedings, our country officially included the “System of leniency for confession and punishment” in the “Criminal Procedure Law” in 2018. The application of this system has the problems of formalization of duty lawyer's work and the lack of independence and validity of lawyer's defense in the case of guilty plea. From the perspective of the emerging value of criminal procedure, this paper analyzes the exercise of the independent defense right of the lawyer in the case of pleading guilty to punishment, change the relationship between prosecution and trial.