The embodiment of the invention belongs to the technical field of automatic cutting for steel structures, and provides an intelligent production line for small component cutting. A manufacturing execution system issues production instructions for all devices; materials to be cut and loading trays are conveyed by a loader to various corresponding cutting machine platforms in a cutting machine for cutting machining; after the materials to be cut are cut into small components, the small components are sprayed with serial numbers and codes through an automatic spraying gun and then conveyed back to the loader, the loader conveys the small components and the loading trays to a sorting trolley, and the small components are sorted through a numerical control sorting machine and stacked in storage trays. All the machining devices in the production line are comprehensively arranged through the manufacturing execution system, and the efficiency of the production line is improved. The various cutting machine platforms are applied, so that cutting requirements of small components with different specifications are met, and optimization of machining quality is achieved. The numerical control sorting machine is applied for automatic sorting and stacking, so that sorting and cutting are carried out at the same time, equipment waiting time is shortened, small component production efficiency is improved, and the labor cost is reduced.