Metallocene catalyst was prepared based on the SINOPEC’s “Metallocene Adduct Technology”.Great effort was paid on the support procedure to obtain the supported catalysts. The supported catalysts were evaluated in slurry, loop slurry and gas phase fluidized bed pilot plant of polyethylene processes respectively. The metallocene adduct catalyst could catalyze the polymerization of ethylene as well as the co-polymerization of ethylene with α-olefin. Based on the pilot plant experiment results the commercial tr...