Legal basis: the Central Committee of the Communist Party of China's Opinions on Carrying out the Education and Rectification of the National Political and Legal Team, the "four tasks" of building political loyalty, eliminating the black sheep, rectifying stubborn diseases and carrying forward the spirit of the British model, the party's ongoing study and education on party history, and the overall implementation of the central inspection and rectification work; We must adhere to the combination of basing ourselves on the present and focusing on the long-term, paying attention not only to the implementation of key tasks, but also to finding problems and establishing a sound long-term mechanism; We must adhere to the combination of negative warnings and positive incentives, take "tempering justice with mercy" as the guide, and take "strict investigation" as the force. Through case evaluation, casing supervision, political supervision and other means, the clues of police violations of law and discipline are investigated, and the deep-seated reasons behind violations of law and discipline are deeply analyzed.