8.3。This automatic poultry eviscerator was designed based on imported advanced poultry-eviscerating technology. The machine can eviscerate all poultry entrails at once, with the exception of the lung and kidney. The main parts of this prototype were introduced, including chain wheel system, eviscerating manipulator, cam mechanism and height adjustment mechanism etc. Processing tests were done to measure the main performance indexes of the prototype. The results showed that the optimum distance between the shackle bottom and the manipulator extremity was 310~320mm for a duck size range of 2.5～3.5kg (live weight). The percent of remaining entrails was 5.6%. The liver was easy to damage and the entrails damage mark was 8.3. 