commutation,as a system of conditionally reducing punishment in the implementation,fully embodies the criminal policy combining punishment and education and reform,and plays a positive role in accelerating the process of transforming criminals.But commutation system itself has some drawbacks which make malignant criminals regain freedom in the guise of good performance in acvance.This brings about tremendous factors of instability and makes commutation less drffective.The author tries to overcome the draw backs of commutation by demonstrating aplication objects in amending the existing criminal law.