The invention relates to a preparation method for a heterogeneous
olefin polymerization catalyst. The preparation method comprises the following steps: 1) mixing substituting arylamine with
triethylamine, adding
dichloromethane as a
solvent, placing into a low-temperature reaction bath and cooling, and then dropwise adding a
dichloromethane solution of
trifluoromethanesulfonic anhydride and fully stirring, and after heating up, stirring under a
backflow condition till fully reacting, and then washing, separating solution,
drying, distilling and washing
hexane, thereby obtaining a
sulfonyl amine compound, and 2) adding a
magnesium-containing compound into pre-cooled
titanium tetrachloride, performing
titanium loading reaction for the first time, heating up, and then adding the
sulfonyl amine compound and reacting for a half hour, filtering out the supernatant, adding the
titanium tetrachloride and performing the titanium loading reaction for the second time, filtering out the supernatant, washing and
drying, thereby obtaining the heterogeneous
olefin polymerization catalyst. The preparation method provided by the invention has the advantages that the preparation and reaction of the
sulfonyl amine compound as an inner fed
electron body are simple; the products are easily separated and purified; the catalyst has higher catalytic activity for
olefin polymerization reaction; and the catalyzed alpha-olefin
polymerization product has higher stereoregularity.