In today's era of sustainable development, all walks of life are actively exploring new environmentally friendly and efficient packaging materials. Among them, 3-Ply Bag with PE Liner (three-layer kraft paper bag lined with polyethylene) as an innovative and environmentally friendly packaging solution is gradually gaining widespread attention and recognition in the market. This article will conduct an in-depth discussion on the characteristics, applications, environmental advantages and future development trends of 3-Ply Bag with PE Liner.