Salted duck eggs can be kept in the refrigerator for 5 to 7 days. The storage time mainly depends on the preservation ability of salted duck eggs. If the salted duck eggs are kept in the refrigerator for 7 days and still have no odor, they can continue to be eaten. But observe the state of salted duck eggs. If salted duck eggs are in bad condition or go bad, it is suggested to stop eating them to avoid adverse consequences.