The third police revolution is marked by the modernization of police in Europe and America. From 1930s to 1970s, the major western countries gradually completed the police modernization, and the police establishment and police budget of all countries increased greatly. The third police revolution is based on making the police become "fighters against crime", and all kinds of police equipment are updated quickly.

The modernization of command and communication is the key link of the third police revolution. Its realization has laid a solid foundation for the rapid response mechanism and effectively strengthened the efforts to crack down on crime. Modernization has made the world police more powerful, promoted profound changes, and taken on a new look.

Police "four modernizations";

Car patrol replaces step patrol, communication modernization, computer revolution and personal equipment modernization. At this time, the image of the policeman is a "mechanical policeman", with a helmet on his head, a walkie-talkie on his shoulder, a shield in his hand and a pistol at his waist. However, the result of this police revolution was a failure, because it positioned the police to fight crime and respond quickly, but the people found that "the wheels run faster and faster, and the police are farther away from the public".

They put forward a new slogan: "Better be a porter than a robot". Increasing the police force has also brought some negative consequences. While the police force is growing, the crime rate is rising rapidly.