The performance of corrosion inhibition is salience. This bag overcome the shortcoming of inadequate protection to the product, and fit to metal, machine equipment which is used in machining, storage, transport on the sea and high quality requirement of corrosion inhibition in export. Also, it has high efficient of package that can use adhesive tape, stapler and elastic to envelop which make corrosion inhibition and package automatic. The bag can save work, time and cost. Therefore, the bag has excellent economic efficient, and accord with environment friendly. The bag has no pollution and can be reused. The period of validity of the bag will last 1~3 years. The parts can be seen directly without opening the bag.