公安机关预防、打击黑恶犯罪,必须立足于防,建立高效灵敏的预警机制;以打援防,建立快速反应的侦破机制;齐打共防,建立多层次的协作机制;强基固本,建立雄厚牢固的保障机制;严格执法,建立处置有力的法律援助机制。 Public security organs must prevent and crack down on criminal activities based on the principle of prevention and set up a highly efficient and early warning mechanism. They must take measures to defend themselves against attacks and establish a quick response detection mechanism. They should fight together to establish multi-level cooperation mechanisms. Strong and solid security mechanism; strict law enforcement, the establishment of effective legal aid mechanism.