Olefin polymerization catalyst carrier, olefin polymerization catalyst solid component, preparation method thereof and olefin polymerization method

The invention discloses a preparation method of an olefin polymerization catalyst carrier, the olefin polymerization catalyst carrier prepared by the method, a preparation method of an olefin polymerization catalyst solid component, the olefin polymerization catalyst solid component prepared by the method and an olefin polymerization method. The preparation method of the olefin polymerization catalyst carrier comprises the following steps: in inert atmosphere and under existence of a methanolation catalyst, reacting magnesium metal and C1-C10 alkyl alcohol, wherein the methanolation catalyst contains a halogen simple substance and a halogen containing compound. The olefin polymerization catalyst solid component has high catalytic activity, and the obtained polymer has the advantages of high isotacticity and good fluidity, and has industrial application prospect.