At present, the phenomenon of juvenile delinquency is becoming more and more prominent, but the case of younger criminal offences cannot be simply equated with the general improvement of juveniles’ cognitive ability. The minimum age of criminal responsibility should not be lowered. Otherwise, it is neither conducive to the function of punishment, the protection of adults and the stability of the law, nor inconsistent with the development trend of the international community. The question of juvenile delinquency can be solved by expanding the crime of relative criminal responsibility, developing and improving the community correction system, establishing and perfecting the security punishment system, and establishing a compulsory parental system.