From the perspective of the reform of the petition system,and focusing on the dialectical relationship between the right of citizen supervision and the right to petition,this paper conducts theoretical research and empirical analysis on the chaos and causes of the practice of the right of supervision,the reform plan of the petition system and the practical effect,and believes that under the current constitutional system,the position and function of the petition system have been seriously misplaced,which has weakened and impacted the legal system supporting the right of supervision,or even replaced it.Therefore,it is necessary to accurately locate the auxiliary position of the petition system,give full play to its supplementary function,improve and improve the supporting legal system for citizens'right to supervise,and make its preset procedures and mechanisms the main practical path for the exercise of supervision power.