Double layer forming fabric is a forming fabric used for high quality paper production. The weaving process of the double layer forming fabric of Sun Hong is different. The double layer forming fabric contains a group of longitudinal fibers and two groups of transverse fibers. Even small fibers can be retained on the top layer. Sun Hong uses thickened fiber weaving on the bottom to obtain better forming effect. The double layer forming fabric is more stable than the single layer forming fabric due to its structural design.