The invention discloses an egg preservative being safe and being free of toxic and side effects, which is prepared from the raw materials including, by weight, 20-25 parts of sodium lactate, 24-30 parts of sodium sulfite, 12-18 parts of chitosan, 10-20 parts of Chinese violet, 8-15 parts of bletilla striata, 60-75 parts of acetic acid, 10-16 parts of a surfactant and 40-45 parts of water. Compared with the prior art, the egg preservative is low in cost, is easy to prepare, and can form a thin film, which has good preservative and sterilizing performance, long preservation period and good moisturizing effect, on eggs.