Since the establishment of the first juvenile court in Illinois, USA in 1899, the juvenile justice system has gradually been accepted all over the world for more than 100 years, especially after World War II. With the establishment of the United Nations, The Convention on the Rights of the Child, The United Nations Minimum Standard Rules for Juvenile Justice (Beijing Rules) and other multilateral treaties and rules have been reached. It has become a consensus that juveniles adopt a judicial system different from adults. Most countries have established juvenile justice systems in line with their national conditions. It has played an important role in safeguarding the legal rights of juveniles and preventing juvenile delinquency.<BR> After the founding of New China in 1949, especially since the reform and opening up in 1979, the Chinese government attaches great importance to the protection of juveniles. It has continued to explore the juvenile justice system and other aspects, forming a preliminary form of a socialist juvenile justice system with Chinese characteristics. In order to make China"s juvenile justice system more perfect, it must be improved from the following aspects. Develop an independent juvenile law. This is a necessary condition for the protection of juvenile justice. Develop an independent juvenile law to unify the provisions on juveniles scattered in other laws. Moreover, juvenile law should contain relevant content of substantive law and procedural law. As the main basis for handling juvenile cases. Identify the age range of teenagers. At present, Chinese laws generally only set an upper limit for juvenile age, but not a lower limit. It is more difficult to make decisions on the protection and punishment of juvenile cases, such as admission, education, and work school education. In addition, it is necessary to expand the age range for teenagers. Drawing on the legislation of other countries, it is reasonable to limit the age range of juveniles to between 10 and 20. Improve the content of juvenile protection and punishment. The juvenile delinquency, juvenile delinquency and juvenile offender behavior are attributed to the juvenile non-business concept. A distinction is made between criminal sanctions and juvenile protection sanctions. Define different approaches. Types of measures to increase protection, such as: government shelters, education at work schools, compulsory detoxification, ordering education, admonitions, public security detention, etc. Establish a judicial system for juvenile cases. Incorporate all processing into judicial process. Juvenile cases are tried and judged by the courts, and the juveniles are given the right to remedy the results of the process.