▎ 摘　　要

NOVELTY - Supported catalyst i.e. titanium-based compound (I) is new. USE - (I) is useful for preparing polyolefin, preferably ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 4-methyl-1-pentene, 1-decene, 1-dodecene and 1-octadecene (all claimed). DETAILED DESCRIPTION - Supported catalyst i.e. titanium-based compound of formula (I) is new. The carrier in (I) includes silica, magnesium oxide, titanium dioxide, zinc oxide, aluminum oxide, magnesium chloride, glass fiber, graphene, expanded graphite, ammonium polyphosphate and/or carbon black. R1= 1-12C hydrocarbon groups, phenyl (optionally substituted), H, or substituted silicon group; R2-R9= 1-12C hydrocarbon groups, phenyl (optionally substituted), H, fluoro, chloro, bromo, iodo, nitro, hydroxy or substituted silicon group; either X, Y = fluoro, chloro, bromo, iodo, 1-12C hydrocarbon group, aryl group, oxygen-containing group, nitrogen-containing group, sulfur-containing group, boron-containing group, aluminum-containing group, phosphorus-containing group, silicon-containing group or tin-containing group; or XY can form = bond or ring; and M = lithium, sodium, potassium, rubidium or cesium. INDEPENDENTS CLAIMS are included for: preparation of (I); and use (I) for preparing polyolefin comprising carrying out catalytic polymerization of olefins using supported catalyst i.e. titanium-based compound.