Aiming at bring into effect excruciation to defendant, bourgeois are incessant development and perfect, establish no additional punishment resulting from retrial procedure.

针封建审被告人施以酷刑，任意加刑罚现象，资阶级在禁止不利益变更原则基础上不断和完善，在再审程序中确立了再审不加刑原则。