The types of police can be divided according to different criteria.
According to the division of duties, which can be divided into:
Police Force: Responsible for maintaining public order and combating criminal activities.
Criminal Police: Responsible for investigating criminal cases and arresting criminal suspects.
Traffic police: Responsible for managing traffic order, preventing and dealing with traffic accidents.
Patrol Officer: Responsible for patrol prevention and control, crime prevention.
SWAT: Responsible for handling emergencies, counter-terrorism and stability maintenance.
Depending on the department to which it belongs, which can be divided into:
People's police of public security organs: Led by the Ministry of Public Security, including public security, criminal, traffic, patrol police, special police and other police types.
People's police: Led by the *** department, responsible for maintenance
Judicial-administrative organs, people's police: Led by the Ministry of Justice, responsible for prisons, **, etc.
People's courts, people's procuratorates, judicial police: Responsible for assisting the judiciary in enforcing the law.
According to the police rank, which can be divided into:
Superintendent of Police
Inspector of Police
Superintendent
Constable
Depending on the type of police, which can be divided into:
Police ForceCriminal Police
Traffic policePatrol Officer
SWATForest Police.
Railroad Police. Water Police.
Aviation Police. Border police.
Port Police. Foreign Affairs Police.
Anti-narcotics police. Fire Police.
Internet Police. Highway Police.
Forensic. Trace inspection.
Wait a minute. 
In addition, there are some law enforcement officers who are not people's police, also known as "police", such as:
Urban management law enforcement officers.
Industrial and commercial law enforcement officers.
Customs Anti-Smuggling Police.
Wait a minute. The specific situation is subject to local ** regulations.
Author:Niu Zhiqiang, more than 10 years of lawyer practice experience, member of Beijing Jiusan Society, excellent lawyer of law and family insurance, lover of history, psychology and Chinese culture, for "police types", if you have any other questions, please leave a message in the comment area!