Oil filter paper has good functions of strong absorption and high-level intensity against pressure. Oil filter paper is used to filter petroleum, chemical products and industrial oils as well as other industrial organic suspended turbid liquids to separate solid and semi-solid debris in them, for example, filter transformer oil special for filter press machines, turbine oil, paraffin-oil-melting and fat-melting synthetic resin, dioctyl sebacate and other organic liquids. Oil filter paper is not used to filter water or other inorganic liquid suspension.