Four novel indenyl phosphine gold complexes were prepared by the reaction of indenyl phosphine with AuCl-(SMe)2. All products 1~4 have been fully characterized by elemental analysis, spectroscopy, and X-ray crystal diffraction techniques for 2 and 4. Complex 2 has been found efficiently to catalyze hydration of alkyne with the advantages of mild reaction conditions, less catalyst, excellent atomic economy and environmental friendly.