A system for enabling magnetic belts to follow laser-cutting dynamically, characterized in that, the system comprises: a processing station; a laser-cutting unit provided at the processing station and comprising at least one laser cutter and a laser cutting head; and characterised by the following features: two sets of magnetic belts arranged respectively on a feeding side and a discharging side of the processing station, with each magnetic belt of the sets being able to be stretched and retracted and the distance between magnetic belts being adjustable; a feeding robot and a tooling of the feeding robot, which are arranged on an outer side of the set of magnetic belts on the feeding side of the processing station, with a pile of blocks being arranged on the opposite side and a block edge measuring device being installed at the tooling; a discharging robot and a tooling of the discharging robot, which are arranged on an outer side of the set of magnetic belts on the discharging side of the processing station, with a pile of sheets being arranged on the opposite side; a scrap conveyor device arranged on the side of the processing station perpendicular to the feeding direction; a dust treating device and a real-time measurement device for the cutting of the blocks, which are provided at the processing station; a position detecting device in front of the pile of sheets and a transfer location arranged at the position of the set of magnetic belts on the discharging side outside the processing station; and a cutting control system, which is respectively connected to the sets of magnetic belts, the laser-cutting unit, the feeding robot, the discharging robot, the scrap conveyor device, the dust treating device, the real-time measurement device and the position detecting device for the sheets, so that the units and devices communicate with each other to establish an associative operation control and the stretching and retraction of the magnetic belts follow the laser cutting head. a processing station; a laser-cutting unit provided at the processing station and comprising at least one laser cutter and a laser cutting head; and characterised by the following features: two sets of magnetic belts arranged respectively on a feeding side and a discharging side of the processing station, with each magnetic belt of the sets being able to be stretched and retracted and the distance between magnetic belts being adjustable; a feeding robot and a tooling of the feeding robot, which are arranged on an outer side of the set of magnetic belts on the feeding side of the processing station, with a pile of blocks being arranged on the opposite side and a block edge measuring device being installed at the tooling; a discharging robot and a tooling of the discharging robot, which are arranged on an outer side of the set of magnetic belts on the discharging side of the processing station, with a pile of sheets being arranged on the opposite side; a scrap conveyor device arranged on the side of the processing station perpendicular to the feeding direction; a dust treating device and a real-time measurement device for the cutting of the blocks, which are provided at the processing station; a position detecting device in front of the pile of sheets and a transfer location arranged at the position of the set of magnetic belts on the discharging side outside the processing station; and a cutting control system, which is respectively connected to the sets of magnetic belts, the laser-cutting unit, the feeding robot, the discharging robot, the scrap conveyor device, the dust treating device, the real-time measurement device and the position detecting device for the sheets, so that the units and devices communicate with each other to establish an associative operation control and the stretching and retraction of the magnetic belts follow the laser cutting head. two sets of magnetic belts arranged respectively on a feeding side and a discharging side of the processing station, with each magnetic belt of the sets being able to be stretched and retracted and the distance between magnetic belts being adjustable; a feeding robot and a tooling of the feeding robot, which are arranged on an outer side of the set of magnetic belts on the feeding side of the processing station, with a pile of blocks being arranged on the opposite side and a block edge measuring device being installed at the tooling; a discharging robot and a tooling of the discharging robot, which are arranged on an outer side of the set of magnetic belts on the discharging side of the processing station, with a pile of sheets being arranged on the opposite side; a scrap conveyor device arranged on the side of the processing station perpendicular to the feeding direction; a dust treating device and a real-time measurement device for the cutting of the blocks, which are provided at the processing station; a position detecting device in front of the pile of sheets and a transfer location arranged at the position of the set of magnetic belts on the discharging side outside the processing station; and a cutting control system, which is respectively connected to the sets of magnetic belts, the laser-cutting unit, the feeding robot, the discharging robot, the scrap conveyor device, the dust treating device, the real-time measurement device and the position detecting device for the sheets, so that the units and devices communicate with each other to establish an associative operation control and the stretching and retraction of the magnetic belts follow the laser cutting head.