The organic-fluorine electret powder TF11 dedicated to melt-blowing cloth has extremely high anti-static capacity with uniform micropores, which can increase the electrostatic adsorption capacity of PP and extend the time efficiency for storage of electric charge for 1 year efficiently. It is applicable to the melt-blowing cloth with a filtering efficiency of 95 or 99. Dosage and use methods The filtering efficiency can be remarkably improved only by adding 0.05-0.1% organic-fluorine electret powder TF11 in the melt-blowing cloth, to extend the storage time of electric charge. Electret masterbatch can be obtained through compounding of TF11 and the melting index PP. The dosage into masterbatch is 5-10% and organic-fluorine electret powder can be added directly during production of those with a melting index of 1,500 through masterbatch. Advantages of organic-fluorine electret powder 1.    Long-lasting static electricity 2.    Rapid charging 3.    Improving filtering indexes