The invention discloses a salt for preserved eggs, which is characterized by comprising: calcium oxide of 32-42 parts, soda ash of 30-40 parts, salt of 15-25 parts, tea leaf of 1-3 parts, and zinc oxide of 0.6-1 part by weight. The salt for preserved eggs overcomes the current defects of preparing preserved eggs by salt with the advantages of: 1. convenient and simple use that normal consumers just need to buy the salt for preserved eggs to prepare preserved eggs at any time according to the description; 2. safety and sanitation that preserved eggs prepared by the method have no lead, which belong to the lead-free preserved eggs, avoid the trouble and insanitation of conventional methods using plant ash to package; 3. delicate flavour and good look that preserved eggs prepared by the method is delicious and not thick in alkaline taste, easy to separate egg shell from egg with complete shape.