The invention relates to a full-automatic ricefield eel slaughtering device. The full-automatic ricefield eel slaughtering device comprises a machine frame, a loading device, a conveying device, a belly dissecting device, a belly separating device, a bone removing device, a transporting device and a segment cutting device, wherein the loading device is mounted on the left side of the upper end of the machine frame; the conveying device, the belly dissecting device, the belly separating device, the bone removing device, the transporting device and the segment cutting device are sequentially mounted on the right side of the loading device from left to right; a first dissecting knife which is vertically placed is arranged on the belly dissecting device, two second dissecting knives which are vertically placed are arranged on the belly separating device, two first cutting knives which are horizontally placed are arranged on the bone removing device, and a second cutting knife which can rotate is arranged on the segment cutting device. Through the adoption of the full-automatic ricefield eel slaughtering device disclosed by the invention, ricefield eels can be full-automatically slaughtered, the full-automatic ricefield eel slaughtering device is convenient to use, and the slaughtering efficiency can be greatly improved; further, the full-automatic ricefield eel slaughtering device disclosed by the invention adopts four kinds of knives for slaughtering the ricefield eels, so that the operations of dissecting bellies of the ricefield eels, removing bones of the ricefield eels, removing internal organs of the ricefield eels and cutting the ricefield eels into segments can be performed.