The ansa-metallocene complexes Me2Ge(η5-C5Me4)2MCI2[M=Ti(1), Zr(2)], Me2Ge(η5-C5H3Bu-t)2ZrCl2(3) and Me2Ge(η5-C5H4)(η5-C5H3R)ZrCl2[R=Me(4), t-Bu (5)] were prepared by the reaction of the corresponding ligands with n-BuLi and MCl4 2THF, respectively. The molecular structures of 1 and 2 have benn determinde by the X-ray diffraction method. Complexe 2-5 in combination with MAO were studied as catalysts for ethylene polymerizatiion and all the germyl-bridged zirconocene catalysts show high activities at relative high temperatures. This indicates that the germyl-bridged zirconocene systems show thermally stable catalyst sysstems for polymerization of ethylene.