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The efficient automatic coating preservation equipment called clean egg coating machine was independently developed, with which clean eggs can be coated and dried. Meanwhile, the control system for batch production was also developed. Experiments of egg in-chain line speed under 6 kinds of different motor frequencies at 5, 10, 15, 20, 25 and 30 Hz respectively were done to test the actual production capacity of the equipment. As a result, the best speed value were found at 12.01 mm/s with the corresponding capacity value at 4804 pieces/h under the following conditions: temperature is 25℃, RH is 60%, spray pressure is 0.6 MPa, spray quantity is 43.6 mL/min, and drying capability of fluid is 1.71 kJ/s. The dryer length is 50cm and the drying time of clean eggs is 4.16 s. 