Nucleating agent for polyolefin and polyolefin composition and preparation method thereof

The invention discloses a polyolefin composition, mainly prepared by the allyl polyolefin, antioxygen and organic nucleating agent according to the weight ratio, the allyl polyolefin is at least one of the polypropylene and propylene copolymer, the organic nucleating agent is at least one of the compounds having the chemical structure formula as follows: FORMULA. R1, R2, R3, R4 are independently selected from the alkyl or the alkyl having the substituent group. The polyolefin composition has the advantages of fast crystallization rate, good transmission of light and high impact strength, the molding cycle is obviously shortened, the molding efficiency and the physical and mechanical properties are raised, and the preparation method is simple and environmental friendly and is easy to realize industrialization production.