The invention discloses a filter for filtering molten metal, which comprises an open porous material, adhesive and a refractory material, wherein the refractory material is stuck to the open porous material through the adhesive, the weight of the adhesive is at least 50 percent, and the weight of the refractory material is no more than 50 percent. The mechanical property of the filter is greatly enhanced and the high temperature resistance of the filter is increased by increasing the component and content of the adhesive in the filter and combining the use of the refractory material, so the filter can filter the molten metal at harsh temperature; and the mechanical properties of castings filtered by the filter such as tensile strength, elongation rate and the like are obviously improved. In addition, the components selected and used in the production of the filter are economic, and the filter is easy to realize in the production process, so the manufacture of the filter is more economic.