Fiberglass needle punched felt is high grade air purification, heat insulation, heat preservation material which made of long fiberglass in a procedure that fiberglass firstly cut into certain length and then processed by thread distribution, fluff formation and pin stinging. It is a nontoxic inorganic material which does not contain any bond component, or without any odor (nonflammable, no smoke) compared to other traditional glass wool and wool product. It is soft and easy cutting, protecting poisoning for workers, so it is also a novel ideal environmental material among various heat preserving and muffle products.