According to the empirical research of 768 judgment documents made by the court since the establishment of the Supervisory Commission, it is found that the defense rate of the entrusted lawyer is high; the duration of detention is relatively long and the arrest rate after the removal of detention is high; the system of leniency of confession and punishment and the application rate of quick decision procedure are low;the illegal evidence is difficult to exclude; the conclusion of the case is based on verbal evidence, and the mutual “confirmation” of the evidence has become a typical mode of handling such cases. Based on this, it is necessary to guarantee the time and litigation rights of defense lawyers to intervene; to improve the applicable standards of retention measures; to clarify the applicable standards of leniency system of confession and punishment in duty crime cases and the procedures of obtaining and presenting synchronous audio-visual materials; to implement the principle of direct words in court trial, to strengthen the examination of evidence, and to establish a mechanism for witnesses, appraisers and investigators to testify in court.