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60min。Forced-air precooling to the egg fresh keeping and storage was applied, and the effect of cold air temperature, ventilation velocity, and the egg weight in the precooling process was investigated. The results showed that the lower the cold air temperature was, the quicker the precooling velocity would be. The appropriate precooling temperature was 0℃. Also, the precooling velocity increased as the ventilation velocity increased in certain extent. A high precooling efficiency could be achieved when the ventilation velocity was 1.67m/s. The precooling velocity reduced when the egg was bigger. So the eggs should be divided by the weight first, and then precooled according to the levels to keep the consistent precooling velocity. The best effective precooling period was within 60 min. 