The invention provides a method for forming a dual layer composite material, including: coating a barrier film layer forming material onto a surface of a porous scaffold layer to form a dual layer intermediate product； and drying the dual layer intermediate product to form a dual layer composite material which includes the porous scaffold layer and a barrier film layer, wherein the porous scaffold layer and a barrier film layer are inseparable from each other.本發明提供一種形成雙層複合材料的方法，包括：將一阻擋薄膜層形成材料塗覆於一多孔支架材料層之一表面上，以形成一中間雙層產物；以及將該中間雙層產物進行乾燥，以形成一雙層複合材料，其具有該多孔支架材料層與一阻擋薄膜層，其中該多孔支架材料層與該阻擋薄膜層為不可分離。
