Security check portrait acquisition and association method in general scene

The invention discloses a security check portrait acquisition and association method in a general scene, which integrates portrait acquisition and association into the same system, acquires the portraits of checked persons in real time at a security check channel entrance, a security check equipment entrance and a security check equipment exit, and associates the portraits. If the portrait at the entrance of the security check channel cannot be matched with the portraits at the entrance and the exit of the security check equipment, real-time alarm is given, and the situation of personnel missing detection is avoided. As the associated portraits at the three positions are collected, the portraits at any position can be used for searching the portraits at the other two positions, so that the later personnel rechecking and tracing efficiency is improved, and one-by-one troubleshooting through video recording is avoided. Meanwhile, in the portrait collection and association process, people do not need to stay and