The invention discloses an automatic fiber producing and processing cutting device. The automatic fiber producing and processing cutting device comprises a machine body, a material disk, a clamping device, an emergency stop button, an operation panel, a belt pressing wheel, a cutting-off punching die and a leftover collecting box; the operating panel and the leftover collecting box are arranged on the front side of the machine body; a stand rod is arranged above the machine body which is connected and provided with the material disk through the stand rod; the emergency stop button is arranged above the machine body; the clamping device is arranged on the material disk; and the belt pressing wheel and the cutting-off punching die are arranged on the portion, on the right side of the telescopic material disk, of the machine body. The automatic fiber producing and processing cutting device is convenient and reliable to operate, and attractive and elegant in appearance, a white steel cutter is adopted, the automatic fiber producing and processing cutting device is durable, and the belt cutting work efficiency is greatly improved.