The crime is light in nature and less harmful. According to the specific provisions of China's criminal law, the crimes that can be controlled mainly focus on the crime of disrupting social management order and the crime of disrupting marriage and family. The common characteristics of these crimes are that the nature of the crime is not very serious and the social harm is small. 2. Less personal danger. Control is not to deprive criminals of their personal freedom, but to limit their personal freedom to a certain extent. Therefore, criminals who apply public surveillance punishment must be people with less personal danger. If the personal danger of crime is very great, it is difficult to achieve the purpose of crime prevention by control.