Novel type sealing filler for oil pumping unit and preparation method thereof

The invention discloses a novel type sealing filler for an oil pumping unit and a preparation method thereof. The sealing filler comprises 35-48 parts of polypropylene, 20-46 parts of rubber, 4-10 parts of vulcanizing agent, 4-14 parts of metal alloys and ceramic powder and 4-10 parts of lubricant. Polypropylene with high steric regularity is prepared by catalyzing the polypropylene, so that rigidity, modulus and impact resistance of isotatic polypropylene are improved; modification treatment is carried out with silicone rubber and nitrile rubber to obtain a copolymer, wherein chemical corrosion resistance and creep resistance of the copolymer are effectively improved, so that the copolymer is especially suitable for being applied in a complex oil well environment; ceramic powder and metal composite powder are further added, so that strength and rigidity modulus of the material are improved for resisting impact force generated in an oil pumping process; and self-lubricating performance of the material is stre