Establishing a long-term mechanism for eradicating gangs is a problem that governments of all countries must face in cracking down on gang-related crimes. In recent years, many scholars at home and abroad have made rich research results. Many scholars based on the actual cases of Mafia related crimes in a certain area to summarize, obtain relevant experience, and put forward the methods to crack down on Mafia related crimes. However, there are few special studies on how to establish a long-term mechanism for eradicating criminals and evils at a macro level. There is a certain gap between the problems encountered in practice, especially from the long-term perspective. There are many issues worthy of study in the specific methods of mechanism establishment. This article is a special topic research using normative research methods. The full text is divided into three parts: the first part is the connotation and characteristics of crimes involving gangs and crimes; the second part is about the problems and causes of the current struggle against gangs and evil; the third part is the establishment of a long-term mechanism for the eradication of gangs Related suggestions.