汪伪南京市警察机构的前身是“南京市自治委员会”的“南京市警察厅”。汪伪政府成立后，接管了伪维新政府的“南京警察厅”并改为“首都警察厅”。设立“警政部”将警政从内政中分离出来和“首都警察厅”的第四科掌政治警察事项是“汪特合流”的结果。从伪首都警察厅到伪首都警察总监署，汪伪南京市警察机构先后隶属于伪警政部、伪内政部、伪行政院、伪内政部，地位得到提升、权限随之扩大。

汪伪上海市警察机构的前身是“上海市大道政府警察局”。汪伪政府成立后，接管了伪维新政府的“上海特别市警察局”。为与租界争夺越界筑路地带的警权，汪伪与租界谈判，设立了“沪西特别警察总署”，后改为“沪西警察局”。“收回”上海的公共租界和法租界后，汪伪上海市四个市级警察机构并存，随后逐步统一为“上海特别市警察局”。汪精卫死后，“上海特别市警察局”在周佛海的调整下开始办理“收场”。国民政府派员接收后，汪伪上海市警察机构彻底覆灭。随着日本政策的变化，上海市的伪警察机构也跟着变化，汪伪上海市警察机构的变化更是日本政策变化的反映。

为培养警察，汪伪在“中央”设有“中央警官学校”，在各“省”设有“警士教练所”。汪伪通过降低考选要求解决警察生源不足的问题，通过缩短修业期限解决警察供给不足的问题，通过“员警联保”对警察进行人身控制，通过“精神教育”和“警察训条”对警察进行思想控制。尽管汪伪政府处心积虑地想要拉拢警察，也在提高警察待遇上做了一些努力，但事与愿违，警察涨薪幅度未能跟上警察高昂的生活成本。汪伪的警察品质败坏、官员贪污腐败，加大了沦陷区民众对汪伪政权的厌恶和不满。

汪伪宁沪警察机构协助两市的军队、宪兵、特工“确立治安”，协助日汪推行物资统制，控制报刊舆论、检查艺术作品，不仅给两地的民众带来了极大的痛苦，也对抗日工作的开展带来了巨大阻碍。汪伪通过派遣警官留日、访日，日方通过视察、操控、鼓励汪伪宁沪警察机构构成了双方互动的主要内容。日本警察讲习所通过奴化教育让伪政府的警察协力建设“东亚新秩序”，并收到了效果。日方对汪伪宁沪警察机构的操控和鼓励，使后者带有傀儡性和工具性的特点。对比伪满、台湾和日本本土，可以发现日伪政权的警察有一些共性特征。汪伪的警政机构虽然完备，但其效能得不到充分发挥。中国共产党深入敌后，建立基层党组织、加强军民团结、开辟敌后战场，广大农村仍为抗日军民所控制，汪伪政府缺乏控制地方政权的政治力量。

The predecessor of Nanjing police agency within the puppet government of Wang Jingwei was the "Nanjing Police Department" of the "Nanjing Municipal autonomous committee". After the establishment of the puppet government, Wang Jingwei took over the "Nanjing Police Department" of the puppet Reform government and changed it to "Capital Police Department". The establishment of the "Police Administration Ministry" to separate the police administration from the internal affairs and the fourth section of the "Capital Police Department" to take charge of the political police affairs is the result of the confluence of Wang Jingwei with agents led by Ding Mocun and Li Shiqun. From the puppet Capital Police Department to the puppet Capital Police General Supervision Department,Wang Jingwei's puppet government's Nanjing police agency was affiliated to the puppet Ministry of Police Administration, the puppet Ministry of Internal Affairs, the puppet Executive and the puppet Ministry of Internal Affairs, and its status has been upgraded and its authority has been expanded.

The predecessor of Shanghai police agency within the puppet government of Wang Jingwei was "Shanghai Dadao Government Police Station". After the establishment of the puppet government, Wang Jingwei took over the "Shanghai Special Police Station" of the puppet Reform government. In order to compete with the concession for the police power in cross-border road construction area, Wang Jingwei's puppet government negotiated with the concession and established "Huxi Special Police Department", which was later changed to "Huxi Police Bureau". After "recovering" the public and French concessions in Shanghai, Wang Jingwei's puppet government coexisted with four municipal police agencies in Shanghai, and then gradually unified them into "Shanghai Special Municipal Police Department". After Wang Jingwei died, " Shanghai Special Municipal Police Department" began to handle the "closure" under Zhou Fohai's adjustment. After the national government sent officers to receive the police, Wang Jingwei's puppet government in Shanghai completely ended. With the change of Japanese policy, the puppet police agency in Shanghai also changed, and the change of Shanghai police agency of Wang Jingwei's puppet government is the reflection of the change of Japanese policy.

In order to train the police, the puppet government of Wang Jingwei set up a "Central Police Academy" in the "Central" and "Police Coaching Institutes" in each "province". The puppet government of Wang Jingwei solved the problem of insufficient police students by reducing the requirements for examination, the problem of insufficient police supply by shortening the period of study, the personal control of police through "police-police joint guarantee", and the ideological control of police through "spiritual education" and "police instructions". Despite efforts by the puppet government of Wang Jingwei to win over the police and improve their treatment, the increase in police salaries has not kept pace with the high cost of living. The corrupt quality of the police and the corruption of the officials in the puppet government of Wang Jingwei increased the hatred and dissatisfaction of the people in the occupied areas towards the puppet government of Wang Jingwei.

The police agencies of Nanjing and Shanghai of Wang Jingwei's puppet government assisted the army, military police and secret agents of the two cities in "establishing public order", and assisted Japan and Wang Jingwei puppet government in carrying out material control, controlling newspapers and public opinion and inspecting works of art, which not only brought great pain to the people of the two places, but also brought great obstacles to the development of anti-Japanese work. Wang Jingwei puppet government sent police officers to learn and visit Japan, and Japan inspected, manipulated and encouraged the police agencies in Nanjing and Shanghai of Wang Jingwei puppet government. The Japanese Police Academy succeeded in encouraging police under the puppet government to build a new Order in East Asia through slave education. Japan manipulated and encouraged the police agencies in Nanjing and Shanghai under the puppet government of Wang Jingwei, which made the latter have the characteristics of puppets and tools. By comparing the puppet Manchukuo, Taiwan and Japan, we can find that the police of the puppet Japanese regime have some common characteristics. Although the police and political institutions of Wang Jingwei's puppet government were complete, their effectiveness could not be fully brought into play. The Communist Party of China went deep behind enemy lines, established grassroots party organizations, strengthened the unity between the army and the people, and opened up battlefield behind enemy lines. The vast countryside was still controlled by the anti-japanese army and the people, and the puppet government of Wang Jingwei lacked the political power to control the local political power.