Ring-opening metathesis polymerization (ROMP) of dicyclopentadiene (DCPD) was carried out by using (ArO)(6-x)WClx-Et2AlCl (ArO: 2,6-ditertiarybutyl-p-cresoxy, x = 3, 4, 6) and the corresponding polymer-supported catalytic systems. Influences of different homogeneous catalysts, polymerization conditions and immobilization of the homogeneous catalytic systems on polymerization (gelation time, monomer conversion) and synthesized polydicyclopentadiene＇s (PDCPD＇s) mechanical properties were investigated. The experimental results show that using the polymer-supported catalytic systems can not only increase the monomer conversion of polymerization but also improve the synthesized polymer＇s mechanical properties to a certain extent.