The utility model relates to a main belt type security check layer-management system comprising a first layer management system, a second layer management system, a third layer management system, a fourth layer management system, and a fifth layer management system, which are connected together. The first layer management system is used for detecting and scanning the luggage, and transmitting the luggage images to the second layer management system. The second layer management system is used for interpreting the luggage images and transmitting the interpretation information. The third layer management system is used for the reinspection and the unpacking inspection of the suspicious luggage. The fourth layer management system is used for monitoring and managing other management systems. The fifth layer management system is the control system. The main belt type security check layer-management system is advantageous in that the configuration of the system can be optimized, and the economic costs are low; the unmanned X-ray security check device is far from the check-in counter, and therefore the damages on the human bodies caused by the radiation can be prevented; the pressure of the manual interpretation can be relieved by adopting the automatic interpretation, and the labor costs can be saved; under the main belt mode, the luggage can enter the main belt without waiting for the interpretation results, and therefore the working efficiency can be greatly improved, and the popularization and the application can be facilitated.