There are two ways to confine powers in Criminal Procedure of China:the checking mechanism and the supervision mechanism.The checking mechanism plays positive role in controlling the powers in Criminal Procedure while the supervision mechanism can't act well.h will form an irrational trial composition and can't conform to the trend of the development of the relationship between the police and the procurator to strengthen the adjudication supervision.The checking mechanism is more important and more effective than the supervision mechanism.It...