First dust filter in the process of using a low Ang to prevent large particles, large quantities of solid objects into the interior of the filter system. Prevent prevent internal clogging, stuck phenomenon, and when in use, to appropriate periodic inspection and repair. There is, to be cleaned regularly, after use for some time, it will produce some waste or impurities within the system, which we need to clean up the often, so dust filter function is maximized. In addition they often have to ensure that paper is often moist and avoid dry conditions produce, thereby enabling the use of much longer life, more sophisticated filtering effect. Dust filter by using a fiber filter method, enables the dust easily falls into reservoir in dust, and cleaning can be glued to the cartridge peeling sticky impurities, then it will not affect the collection efficiency of the filter cartridge, it will not polluted environment. But also greatly increases the life of the filter cartridge. This indirectly saves money, saves energy. Under the influence of advanced technology and sophisticated production processes, dust filter having a corrosion resistance, pressure, dirt holding capacity, high filtration precision, poor absorption, blockage of small probability, high moisture resistance, support cleaning, sealing effect is strong, tear resistance, long life and low prices, many renewable and other characteristics.