The embodiment of the invention relates to the field of logistics industry truck loading, and discloses an automatic loading system. The automatic loading system comprises a tray disassembling devicefor disassembling products, a conveying belt for receiving the products output by the tray disassembling device and conveying the products, and a loading part for receiving, arranging and placing theproducts. The loading part comprises an accelerating unit, an integrating unit connected with the accelerating unit, and a placing unit. According to the automatic loading system, full-automatic loading can be achieved, dependence on manpower is avoided, the occupied space of the system is reduced, the safety of products is guaranteed, the automatic loading system can adapt to vehicle bodies of different sizes, the applicability of the system is improved, the cost of the system is reduced, and the loading efficiency is improved.