Sealed preservation bag

The utility model discloses a sealed preservation bag. A bag port is hot pressed by a seal strip. The seal strip is formed by a bayonet strip and a neck strip respectively hot pressed on two sides of the bag port, wherein the middle of the neck strip is provided with a stripped neck; the top end of the bayonet strip is equipped with a raised bayonet; the width of the bayonet is smaller than the width of the neck strip, so the height of the bayonet is the same as the height of the neck. The sealed preservation bag is simply structured with novelty, convenience and practicality; the bag port cannot be easily repeatedly opened, so money or other articles can be safety preserved; and the sealed preservation bag is suitable for finance departments or government departments requiring evidence preservation.