The invention provides an artificial simulated aquatic weed manufacturing method. The invention adopts the method that natural aquatic weed is used as a template, a platy soft foam plastic floating type framework in a middle layer is used as a solid bracket, mixed fiber layers are bonded on the both sides of the surface, and therefore an artificial simulated aquatic weed main body is manufacturedby adopting the three-layer composite structure; a plurality of floating balls are arranged at the upper end of the artificial simulated aquatic weed main body equidistantly, a balance sand bag is arranged at the lower end, and therefore the artificial simulated aquatic weed is manufactured. The mixed fiber of hydrophilic fiber and hydrophobic fiber is used as a biological film carrier, the surface characteristic and the physicochemical index parameter of the manufactured artificial simulated aquatic weed are good, the specific surface area is large, the hanging of the biological film is perfect, and the operating performance is steady; the structural design is reasonable, the installation is simple, the production cost is low, and the application is diversiform.