The invention discloses a chain belt type areca nut processing machine. The machine is obtained by improving five former patents of the designer, and comprises a horizontal receiving chain wheel, a chute, a feeding device, a stop lever, material poking rods, a round blade, a chain belt, an areca nut claw nest, a belt-dividing bolt, a coring device, a marinating switch, a marinating gun, a vertical driving chain wheel, a baking tunnel, a discharge chute, an areca nut extrusion fixation device and the like. Areca nuts are placed on the chute in the feeding device, are queued by the material poking rods, fall into the areca nut claw nest on the chain belt from the mouth of the chute one by one, are centered by the extrusion fixation device, enter the round blade and are cut open, and then are cored by the coring device. The chain belt is transited from the horizontal chain wheel to the vertical chain wheel, so knife edges of two half areca nuts which are cut open in the claw nest on the belt face toward the sky along with the torsion of the chain belt, are marinated by the marinating switch and the marinating gun, and then slip out of the baking tunnel. The complete machine is full automatic, has high work efficiency which greatly exceeds that of the manual work, and can marinate cleanly, accurately and quantificationally; the product is uniform, is uniformly baked, and has guaranteed quality; the complete machine has a compact and simple structure and can be maintained easily; and the yield can be increased by increasing the quantity of the blade.