Automatic yarn unloading system and yarn unloading method

The invention provides an automatic yarn unloading system and a yarn unloading method, relates to the technical field of glass fiber production equipment, and solves the technical problems of high cost and low efficiency caused by manual addition of plastic trays in the prior art. The automatic yarn unloading system comprises a yarn unloading device, a yarn receiving device, a conveying device and a disc disassembling mechanical arm, the yarn unloading device comprises a conveying mechanism and a yarn unloading machine, the yarn unloading machine is arranged on the conveying mechanism, and the conveying mechanism is used for driving the yarn unloading machine to move between a yarn unloading position and a yarn receiving position; the tray disassembling manipulator comprises a moving mechanism, an adsorption mechanism and a tray storage mechanism, the adsorption mechanism is connected with the moving mechanism, and the moving mechanism is used for driving the adsorption mechanism to move between the tray stor