Disclosed is a preparation method of titanium catalyst for olefin
polymerization, the method comprising (1) preparing magnesium compound
solution by resolving non-deoxidative magnesium halide and IIIA group atom
compound in a solvent mixture of cyclic ether, at least one alcohol,
phosphorus compound and organosilane with or without hydrocarbon solvent;
(2) reacting said magnesium compound solution with titanium compound,
silicon compound, tin compound or mixture thereof to produce a support;
and (3) reacting said support with titanium compound and electron donor to
produce solid complex titanium catalyst, wherein the particle size and
particle size distribution f said catalyst are regulated by controlling
solubility of the reactants in said steps (2) and/or (3).
