Fresh keeping bottle cap

The utility model discloses a fresh keeping bottle cap, which is composed of an external cover, an inner plug and a bottleneck. The middle of the external cover is a cylindrical storage chamber and an anti-seep circular cylinder, the external side of the circular cylinder is provided with screw threads, and the middle of the inner plug is a circular cone which is matched with the storage chamber of the external cover in sealing mode; the upper part of the circular cone is provided with internal screw-threads and is in the shape of a hollow circle, and the upper part of the excircle of the inner plug is provided with a ratchet. The fresh keeping bottle cap is used for storing various natural beverages, effective components in the beverages can not be destroyed, and the beverages can be preserved without deterioration for a long term. The utility model also has the advantages of reasonable structure, good tightness, easy opening, convenient operation, etc. The fresh keeping bottle cap is not only suitable for storing various beverages, but also is suitable for storing oral liquid medicines and products in other fields.