With the improvement of people's living standards and the development of modern packaging technology, the requirements for grain packaging are also increasing. In order to reduce losses during storage, transportation and sales, a new type of multi-layer paper grain packaging bag has begun to be tested for domestic use and export of flour and starch products. Compared with ordinary paper bags, the strength of this paper packaging is 1.5 times higher. The structure of the packaging bag is reasonable and strong. For example, the glued bottom bag uses a trapezoidal arrangement, with each layer independently bonded, making it even stronger. A four-layer extensible paper bag filled with 25 kilograms of flour can withstand 10 free falls from a height of 1.2 meters without breaking. Paper itself has hygroscopic properties, which can absorb excess moisture from the grain and effectively prevent the grain from becoming damp due to environmental humidity. At the same time, the sealability of paper bags is better than that of cloth bags. Under the same conditions, the shelf life can be extended by two to three months. The prominent advantage of paper bags is that they are non-toxic, odorless, and pollution-free, in line with national grain health standards. Due to the good printing performance of paper, graphics and text can be printed according to user requirements. Valve mouth paper bags made from this paper are very convenient and fast during the flour filling process, with the filling speed increased by 3 times, and no dust flying around, improving the working environment. In addition, since the valve mouth paper bag becomes square after filling, it is easy to stack and not prone to sliding. It can increase the storage capacity by 10% under the same inventory volume, and does not stain the operator's clothes during handling. Given these many advantages, industry insiders believe that promoting the use of paper grain packaging is an inevitable trend for future grain packaging updates and upgrades.