Salicylaldehyde imine ligand (1) and bis(phenoxy-imine) zirconium dichloride complex (2) have been synthesized. Both ligand and complex were characterized by mass spectrum, 1H NMR and 13C NMR. In the presence of MAO as a cocatalyst, the complex 2 was capable to catalyze ethylene polymerization. 2 displayed ethylene polymerization activity of 53.5 kg of PE/mmol of Zr.h at 50 oC and 0.9 MPa pressure in toluene, resulting in ultra-high molecular weight polyethylene with a viscosity average molecular weight value of 3.3x106 g/mol. The introduction of n-hexane as reaction solvent could further increase the molecular weight of obtained polymer to 4.1x106 g/mol.