Automatic forming device for plant fiber fast food boxes

An upper die and a lower die of the plant fiber fast food box automatic forming device are respectively provided with a cooling device, each cooling device comprises a cooling cavity, a circulating cavity, two connecting pieces and a circulating pump, the cooling cavities, the circulating cavities and the connecting pieces are filled with cooling liquid, and heat exchange fins are densely distributed on the outer walls of the circulating cavities. A liquid inlet and a liquid outlet are formed in the two sides of the cooling cavity and the two sides of the circulating cavity respectively, the liquid outlet end of the circulating pump is connected with the liquid outlet of the circulating pump, the two ends of the two connecting pieces are connected between the circulating cavity and the cooling cavity respectively, the connecting pieces are flat plastic belt bodies, a plurality of channels are formed in the connecting pieces at equal intervals, and the sections of the channels are round. The cooling device has