The characteristics of juvenile delinquency: First, the proportion of juvenile delinquency remains high. At present, most families have only one child, so the love for children since childhood has caused children to be too selfish and extreme, which has led to an upward trend of juvenile delinquency and has remained at a high level for a long time, becoming the main part of the criminal population structure; Second, the age of crime tends to be younger. According to statistics, in the 1980s, the average age of juvenile first offenders in China was 16, but in the 1990s, the average age of first offenders had dropped to 14 to 15. This has a very important relationship with teenagers' addiction to the internet. Teenagers are influenced by internet terror, violence, pornography and other bad information, forming a bad world outlook and outlook on life, thus diluting their understanding of legal knowledge. Third, the nature of crimes is mostly violent crimes. At present, the types of juvenile crimes mainly focus on cases that use violence or have obvious violent tendencies, such as robbery, intentional injury, and trouble-making. Due to the weak understanding of legal knowledge, he was reckless and violent when committing crimes; Fourth, the way of committing crimes is ganged. When teenagers commit crimes, in order to give themselves courage or improve the success rate of crimes, they often gather classmates and friends to commit crimes together.