The invention provides a moistureproof pad which comprises at least one moistureproof surface. A first pattern structure is formed on the moistureproof surface. The first pattern structure is closed-ring-shaped and is used for blocking steam outside the periphery of the edge of the moistureproof surface. According to the moistureproof pad, a channel which is formed with a product surface is isolated from an outer environment, and therefore the steam in the outer environment cannot contact with the product surface. Furthermore moistureproof performance of the pad can be improved, thereby reducing influence of a transportation environment and a packing box to a product.