Catalyst component for olefin polymerization and preparation method and catalyst thereof

The invention discloses a catalyst component for olefin polymerization, which comprises the following components or a reaction product of the following components: (1) a magnesium compound, (2) an organic epoxy compound, (3) an organic phosphorus compound, (4) an assistant precipitation agent, (5) Lewis acid, (6) an internal electron donor compound and (7) a surfactant, wherein the surfactant is selected from at least one of acrylate polymers. The invention also discloses a preparation method of the catalyst component. The catalyst component provided by the invention has very high sphericity, the sphericity SPHT of the catalyst component can reach 0.9 or above, and when the catalyst component is used for propylene polymerization, the catalyst component has excellent comprehensive performance and particularly has relatively high orientation capability. 本发明公开了一种用于烯烃聚合的催化剂组分，其包含以下组分或以下组分的反应产物：(1)镁化合物，(2)有机环氧化合物，(3)有机磷化合物，(4)助析出剂，(5)路易斯酸，(6)内给电子体化合物，(7)表面活性剂，其中所述表面活性剂选自丙烯酸酯类聚合物中的至少一种。本发明还公开了所述催化剂组分的制备方法。本发明的催化剂组分