The invention relates to a preserved egg prepared from hen eggs and radix codonopsis. The preserved egg is characterized in that radix codonopsis is added in a feed liquid used for preparing lead-free preserved eggs. The preserved egg prepared from hen eggs and radix codonopsis related by the invention can refresh brain, tonify kidney and nourish blood, has no smell and has a taste better than that of preserved eggs prepared through a traditional method; and the finished preserved egg contains no harmful substances such as lead. The preserved egg disclosed by the invention has the advantages of higher rate of finished products, small investment, short cycle and capability of effectively reducing costs, is very beneficial to popularization and application and has wide market prospects.